//www.getgobooth.com/ 必威体育下载 daily 15 2024-08-20 10:33:37 apsoffice@iphy.ac.cn apsoffice@iphy.ac.cn 2024-08-20 10:33:37 zh Copyright ©Acta Physica Sinica All Rights Reserved. 京ICP备05002789号-1 Address: PostCode：100190 Phone: 010-82649829，82649241,82649863 Email: apsoffice@iphy.ac.cn Copyright ©Acta Physica Sinica All Rights Reserved apsoffice@iphy.ac.cn 1000-3290 //www.getgobooth.com/en/article/doi/10.7498/aps.46.209 Author(s): ZHANG WEN-ZHONG, WANG SHUN-JIN <br/><p>By the method of algebraic dynamics,the exact solutions and Cartan invariant operators of the SU(3) linear nonautonomous quantum system have been obtained,the quantum-classical correspondence of the solutions established.The nonadiabatic Berry phase for a periodic system is also- calculated.</p> <br/>Acta Physica Sinica. 1997 46(2): 209-226. Published 1997-01-05 Author(s): ZHANG WEN-ZHONG, WANG SHUN-JIN <br/><p>By the method of algebraic dynamics,the exact solutions and Cartan invariant operators of the SU(3) linear nonautonomous quantum system have been obtained,the quantum-classical correspondence of the solutions established.The nonadiabatic Berry phase for a periodic system is also- calculated.</p> <br/>Acta Physica Sinica. 1997 46(2): 209-226. Published 1997-01-05 AN ALGEBRAIC DYNAMICS APPROACH TO THE SOLUTION OF THE SU(3)LINEAR NONAUTONOMOUS QUANTUM SYSTEM ZHANG WEN-ZHONG, WANG SHUN-JIN 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 209-226. article doi:10.7498/aps.46.209 10.7498/aps.46.209 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.209 209-226 //www.getgobooth.com/en/article/doi/10.7498/aps.46.227 Author(s): LI BO-ZANG, ZHANG DE-GANG, WU JIAN-HUA, YAN FENG-LI <br/><p>The Bloch theorem holds also for the evolution of states in the cyclic quantum systems in which the Hamiltonian varies cyclically with time.In light of the theorem a new type of geometric phases——Bloch phases——is defined.In this paper it is shown that the resonant-(i.e.,acquired by certain states after evolving a cycle)geometric phases so far discovered can all be unified into the Bloch phases.That is,the Bloch phases are identical with the Pancharatnam phases,Aharonov-Anandan phases and Lewis-Riesenfeld phases,and reduce to the Berry phases in adiabatic approximation.To this end,the equivalent alternation of defining the former three types of quantum phases and the generalization of Lewis-Riesenfeld phases and Berry phases to the degenerate case are made.In addition,two methods are given for efficiently searching for the Bloch phases.</p> <br/>Acta Physica Sinica. 1997 46(2): 227-237. Published 1997-01-05 Author(s): LI BO-ZANG, ZHANG DE-GANG, WU JIAN-HUA, YAN FENG-LI <br/><p>The Bloch theorem holds also for the evolution of states in the cyclic quantum systems in which the Hamiltonian varies cyclically with time.In light of the theorem a new type of geometric phases——Bloch phases——is defined.In this paper it is shown that the resonant-(i.e.,acquired by certain states after evolving a cycle)geometric phases so far discovered can all be unified into the Bloch phases.That is,the Bloch phases are identical with the Pancharatnam phases,Aharonov-Anandan phases and Lewis-Riesenfeld phases,and reduce to the Berry phases in adiabatic approximation.To this end,the equivalent alternation of defining the former three types of quantum phases and the generalization of Lewis-Riesenfeld phases and Berry phases to the degenerate case are made.In addition,two methods are given for efficiently searching for the Bloch phases.</p> <br/>Acta Physica Sinica. 1997 46(2): 227-237. Published 1997-01-05 BLOCH THEOREM FOR THE EVOLUTION OF STATES IN THE CYCLIC QUANTUM SYSTEMS AND THE UNIFICATION OF RESONANT GEOMETRIC PHASES LI BO-ZANG, ZHANG DE-GANG, WU JIAN-HUA, YAN FENG-LI 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 227-237. article doi:10.7498/aps.46.227 10.7498/aps.46.227 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.227 227-237 //www.getgobooth.com/en/article/doi/10.7498/aps.46.238 Author(s): TANG MENG-XI, LI FANG-YU <br/><p>Modulation on electromagnetic waves with angle frequency ωe,travelling around a circular waveguide by high-frequency plane gravitational waves with angle frequency ωg,incident perpendicularly to the plane,where the waveguide is located,is discussed.Results present that in the vicinity of symmetric plane,perpendicular to the travelling direction of gravitational waves, of the waveguide,energy flux density of electromagnetic waves,generally will be added by three new components with angle frequencies(2ωe±ωg)and ωg,respectively.In the case as ωg》ωe,ratio-modulation of amplitude of energy flux density is as large as h0, the dimensionless amplitude of the gravitational wave,in order.Specially,when for ωg,ωe and ω0,the cyclical angle frequency of electromagnetic waves around the waveguide, ωg=2ωe》ω0 is satisfied,energy flux density will be greater than h0 in order because of some mechanism,similar to resonance.The results don't vanish when these parameters have a small change.It is very important to detect the very weak signals of gravitational waves.</p> <br/>Acta Physica Sinica. 1997 46(2): 238-248. Published 1997-01-05 Author(s): TANG MENG-XI, LI FANG-YU <br/><p>Modulation on electromagnetic waves with angle frequency ωe,travelling around a circular waveguide by high-frequency plane gravitational waves with angle frequency ωg,incident perpendicularly to the plane,where the waveguide is located,is discussed.Results present that in the vicinity of symmetric plane,perpendicular to the travelling direction of gravitational waves, of the waveguide,energy flux density of electromagnetic waves,generally will be added by three new components with angle frequencies(2ωe±ωg)and ωg,respectively.In the case as ωg》ωe,ratio-modulation of amplitude of energy flux density is as large as h0, the dimensionless amplitude of the gravitational wave,in order.Specially,when for ωg,ωe and ω0,the cyclical angle frequency of electromagnetic waves around the waveguide, ωg=2ωe》ω0 is satisfied,energy flux density will be greater than h0 in order because of some mechanism,similar to resonance.The results don't vanish when these parameters have a small change.It is very important to detect the very weak signals of gravitational waves.</p> <br/>Acta Physica Sinica. 1997 46(2): 238-248. Published 1997-01-05 MODULATION ON ELECTROMAGNETIC WAVES IN A CIRCULAR WAVEGUIDE BY HIGH FREQUENCY GRAVITATIONAL WAVES TANG MENG-XI, LI FANG-YU 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 238-248. article doi:10.7498/aps.46.238 10.7498/aps.46.238 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.238 238-248 //www.getgobooth.com/en/article/doi/10.7498/aps.46.249 Author(s): QU YI-ZHI, WANG JIAN-GUO, LI JIA-MING <br/><p>Based on the quantum defect theory, the infinite Rydberg states and its adjacent continue states with the same angular moment property will form a channel. Previous studies have considered the collision-induced transitions from a single initial state to a final channel. Here we extend these thoery to include all possible transitions between two channels. By defining a renormalized generalized oscillator strength density (GOSD) which varies smoothly across threshold, the inelastic collisions from an initial channel to a final channel can be treated in a unified manner. As an example, we present the renormalized GOSD of the Rb atom from s-initial to p-final channel, and also from s-initial to s-final channel.</p> <br/>Acta Physica Sinica. 1997 46(2): 249-254. Published 1997-01-05 Author(s): QU YI-ZHI, WANG JIAN-GUO, LI JIA-MING <br/><p>Based on the quantum defect theory, the infinite Rydberg states and its adjacent continue states with the same angular moment property will form a channel. Previous studies have considered the collision-induced transitions from a single initial state to a final channel. Here we extend these thoery to include all possible transitions between two channels. By defining a renormalized generalized oscillator strength density (GOSD) which varies smoothly across threshold, the inelastic collisions from an initial channel to a final channel can be treated in a unified manner. As an example, we present the renormalized GOSD of the Rb atom from s-initial to p-final channel, and also from s-initial to s-final channel.</p> <br/>Acta Physica Sinica. 1997 46(2): 249-254. Published 1997-01-05 INELASTIC COLLISION PROCESS OF Rb ATOM BETWEEN INITIAL AND FINAL CHANNELS QU YI-ZHI, WANG JIAN-GUO, LI JIA-MING 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 249-254. article doi:10.7498/aps.46.249 10.7498/aps.46.249 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.249 249-254 //www.getgobooth.com/en/article/doi/10.7498/aps.46.255 Author(s): HU XIANG-MING, PENG JIN-SHENG <br/><p>Operation in the steady state and squeezing of quantum noise in two-mode two-photon correlated-spontaneous-emission lasers(CEL) are studied via nonliner quantum theory.It is shown that the two-mode two-photon CEL exhibits lasing without inversion and two-mode hysteresis even without triggering.The features of squeezing of quantum noise in the relative amplitude and the average phase are given.</p> <br/>Acta Physica Sinica. 1997 46(2): 255-266. Published 1997-01-05 Author(s): HU XIANG-MING, PENG JIN-SHENG <br/><p>Operation in the steady state and squeezing of quantum noise in two-mode two-photon correlated-spontaneous-emission lasers(CEL) are studied via nonliner quantum theory.It is shown that the two-mode two-photon CEL exhibits lasing without inversion and two-mode hysteresis even without triggering.The features of squeezing of quantum noise in the relative amplitude and the average phase are given.</p> <br/>Acta Physica Sinica. 1997 46(2): 255-266. Published 1997-01-05 THE OPERATION IN THE STEADY STATE AND SQUEEZING OF QUANTUM NOISE IN TWO-MODE TWO-PHOTON CORRELATED-SPONTANEOUS-EMISSION LASERS HU XIANG-MING, PENG JIN-SHENG 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 255-266. article doi:10.7498/aps.46.255 10.7498/aps.46.255 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.255 255-266 //www.getgobooth.com/en/article/doi/10.7498/aps.46.267 Author(s): LI XUE-XIN, XU ZHI-ZHAN, TANG YAN <br/><p>By solving the 1-dimensional time-dependent schrdinger equation,the ionization probability and harmonic spectra of atom under different laser intensities are obtained,and the relation between the ionization and harmonic emmission is discussed.The result is that under certain range of laser intensity during which the ionization is stable or supperessed,the harmonics will be emitted efficiently.</p> <br/>Acta Physica Sinica. 1997 46(2): 267-271. Published 1997-01-05 Author(s): LI XUE-XIN, XU ZHI-ZHAN, TANG YAN <br/><p>By solving the 1-dimensional time-dependent schrdinger equation,the ionization probability and harmonic spectra of atom under different laser intensities are obtained,and the relation between the ionization and harmonic emmission is discussed.The result is that under certain range of laser intensity during which the ionization is stable or supperessed,the harmonics will be emitted efficiently.</p> <br/>Acta Physica Sinica. 1997 46(2): 267-271. Published 1997-01-05 THE NUMERICAL SOLUTION AND ITS APPLICATION IN STRONG FIELD HIGH ORDER HARMONIC GENERATION OF ONE DIMENSIONAL TIME DEPENDENT SCHRDINGER EQUATION LI XUE-XIN, XU ZHI-ZHAN, TANG YAN 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 267-271. article doi:10.7498/aps.46.267 10.7498/aps.46.267 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.267 267-271 //www.getgobooth.com/en/article/doi/10.7498/aps.46.272 Author(s): WEN SHUANG-CHUN <br/><p>A single-particle approach is used to derive the small signal gain for harmonics in the novel wiggler proposed by Pinhas.The results are similar to that in ordinary planar undulator free-electron lasers.</p> <br/>Acta Physica Sinica. 1997 46(2): 272-278. Published 1997-01-05 Author(s): WEN SHUANG-CHUN <br/><p>A single-particle approach is used to derive the small signal gain for harmonics in the novel wiggler proposed by Pinhas.The results are similar to that in ordinary planar undulator free-electron lasers.</p> <br/>Acta Physica Sinica. 1997 46(2): 272-278. Published 1997-01-05 HARMONICS IN NOVEL WIGGLER FREE-ELECTRON LASER WEN SHUANG-CHUN 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 272-278. article doi:10.7498/aps.46.272 10.7498/aps.46.272 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.272 272-278 //www.getgobooth.com/en/article/doi/10.7498/aps.46.279 Author(s): YANG ZHEN-HUA, WU YU-PU <br/><p>In this paper,we have computed with three different methods the electron beam energy modulation in optical klystron on storage ring free electron laser and also computed the effects of the electron beam parameters on energy modulation.The numerical results show that the three dimensional simulation is necessary.</p> <br/>Acta Physica Sinica. 1997 46(2): 279-286. Published 1997-01-05 Author(s): YANG ZHEN-HUA, WU YU-PU <br/><p>In this paper,we have computed with three different methods the electron beam energy modulation in optical klystron on storage ring free electron laser and also computed the effects of the electron beam parameters on energy modulation.The numerical results show that the three dimensional simulation is necessary.</p> <br/>Acta Physica Sinica. 1997 46(2): 279-286. Published 1997-01-05 ELECTRON BEAM ENERGY MODULATION IN SR-FREE ELECTRON LASER YANG ZHEN-HUA, WU YU-PU 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 279-286. article doi:10.7498/aps.46.279 10.7498/aps.46.279 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.279 279-286 //www.getgobooth.com/en/article/doi/10.7498/aps.46.287 Author(s): HUANG YU, WANG MING-CHANG, WANG ZHI-JIANG, J.K.LEE <br/><p>FEL efficiency improvement with magnetic field increasing wiggler has been- investigated.-Numerical simulation with KMR equations considering space charge effect we find that FEL power increase greatly.It is interested that the larger the energy spread is,the greater the FEL power increasement is.Therefore the-whole electron beam of the accelerator can be used for FEL and higher power can be gotten with magnetic field increasing wiggler.</p> <br/>Acta Physica Sinica. 1997 46(2): 287-292. Published 1997-01-05 Author(s): HUANG YU, WANG MING-CHANG, WANG ZHI-JIANG, J.K.LEE <br/><p>FEL efficiency improvement with magnetic field increasing wiggler has been- investigated.-Numerical simulation with KMR equations considering space charge effect we find that FEL power increase greatly.It is interested that the larger the energy spread is,the greater the FEL power increasement is.Therefore the-whole electron beam of the accelerator can be used for FEL and higher power can be gotten with magnetic field increasing wiggler.</p> <br/>Acta Physica Sinica. 1997 46(2): 287-292. Published 1997-01-05 MAGNETIC FIELD GRADUALLY INCREASING WIGGLER HUANG YU, WANG MING-CHANG, WANG ZHI-JIANG, J.K.LEE 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 287-292. article doi:10.7498/aps.46.287 10.7498/aps.46.287 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.287 287-292 //www.getgobooth.com/en/article/doi/10.7498/aps.46.293 Author(s): JIANG SHAO-EN <br/><p>The electron orbits in Gaussian beam′s laser wiggler are analysed.The single-particle orbits due to large amplitude,backward propagating pump laser field and axial guide magnetic field are derived,and the stabilities of the orbits are discussed.It is found that the results agree with that of the plane electromagnetic wiggler.Similiar to the orbits in magnetostatic wiggler in free-electron laser (FEL),the orbits in pump laser field have two classes of orbits.However,different from the orbits in a magnetostatic wiggler,the two classes of orbits in pump laser are stable.</p> <br/>Acta Physica Sinica. 1997 46(2): 293-299. Published 1997-01-05 Author(s): JIANG SHAO-EN <br/><p>The electron orbits in Gaussian beam′s laser wiggler are analysed.The single-particle orbits due to large amplitude,backward propagating pump laser field and axial guide magnetic field are derived,and the stabilities of the orbits are discussed.It is found that the results agree with that of the plane electromagnetic wiggler.Similiar to the orbits in magnetostatic wiggler in free-electron laser (FEL),the orbits in pump laser field have two classes of orbits.However,different from the orbits in a magnetostatic wiggler,the two classes of orbits in pump laser are stable.</p> <br/>Acta Physica Sinica. 1997 46(2): 293-299. Published 1997-01-05 ANALYSIS ON ELECTRON MOTIVE ORBITS IN GAUSSIAN BEAM′S LASER WIGGLER JIANG SHAO-EN 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 293-299. article doi:10.7498/aps.46.293 10.7498/aps.46.293 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.293 293-299 //www.getgobooth.com/en/article/doi/10.7498/aps.46.300 Author(s): WANG PENG-QIAN, TIAN CE-CHAN, SUN TAO-HENG <br/><p>Using the output of one dye laser as the fundamental wave,we have generated tunable VUV coherent radiation from 116.6nm through 119.2nm by nonresonant four-wave sum-mixing process below the first resonance level of Ne.The conversion efficiency was found to be comparatively high because of the very small dispersion in this range.We found that the four-wave sum-mixing output was proportional to the square of the gas density we offered.If we increase the gas density of Ne,the conversion efficiency is estimated to be improved by two orders.</p> <br/>Acta Physica Sinica. 1997 46(2): 300-305. Published 1997-01-05 Author(s): WANG PENG-QIAN, TIAN CE-CHAN, SUN TAO-HENG <br/><p>Using the output of one dye laser as the fundamental wave,we have generated tunable VUV coherent radiation from 116.6nm through 119.2nm by nonresonant four-wave sum-mixing process below the first resonance level of Ne.The conversion efficiency was found to be comparatively high because of the very small dispersion in this range.We found that the four-wave sum-mixing output was proportional to the square of the gas density we offered.If we increase the gas density of Ne,the conversion efficiency is estimated to be improved by two orders.</p> <br/>Acta Physica Sinica. 1997 46(2): 300-305. Published 1997-01-05 THE GENERATION OF TUNABLE VUV COHERENT RADIATION BY FOUR-WAVE SUM-MIXING BELOW THE FIRST RESONANCE LEVEL OF Ne WANG PENG-QIAN, TIAN CE-CHAN, SUN TAO-HENG 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 300-305. article doi:10.7498/aps.46.300 10.7498/aps.46.300 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.300 300-305 //www.getgobooth.com/en/article/doi/10.7498/aps.46.306 Author(s): LIU CUN-YE, LI JIAN, LIANG YI-PING <br/><p>We investigate the crystal structure and the spontaneos evolution of the silver oxide(Ag2O) ultrafine particles(UFP) produced by the vacuun-sputtering method.By using transmission electron microscopy and wide angle X-ray diffractometer and X-ray photoelectron spectrometer,the morphology and nanostructure and size distribution of UFP were measured and analysed.The process of the spontaneos evolution of UFPs was discussed by the spectrum fractal and thermodynamic potential and size-dependence of particles.It was suspected that the self-reduction decrystallization and decompose of crystal Ag2O UFPs might be intrinsic property of the ultrafine structure when the size of aggregate was less than the critical value.Furthermore,The reduced silver atoms have secondary recrystallization effect.</p> <br/>Acta Physica Sinica. 1997 46(2): 306-313. Published 1997-01-05 Author(s): LIU CUN-YE, LI JIAN, LIANG YI-PING <br/><p>We investigate the crystal structure and the spontaneos evolution of the silver oxide(Ag2O) ultrafine particles(UFP) produced by the vacuun-sputtering method.By using transmission electron microscopy and wide angle X-ray diffractometer and X-ray photoelectron spectrometer,the morphology and nanostructure and size distribution of UFP were measured and analysed.The process of the spontaneos evolution of UFPs was discussed by the spectrum fractal and thermodynamic potential and size-dependence of particles.It was suspected that the self-reduction decrystallization and decompose of crystal Ag2O UFPs might be intrinsic property of the ultrafine structure when the size of aggregate was less than the critical value.Furthermore,The reduced silver atoms have secondary recrystallization effect.</p> <br/>Acta Physica Sinica. 1997 46(2): 306-313. Published 1997-01-05 STRUCTURE EVOLUTION ANALYSIS OF ULTRAFINE PARTICLE OF SILVER OXIDE (Ag2O) LIU CUN-YE, LI JIAN, LIANG YI-PING 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 306-313. article doi:10.7498/aps.46.306 10.7498/aps.46.306 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.306 306-313 //www.getgobooth.com/en/article/doi/10.7498/aps.46.314 Author(s): QIU ZHI-YONG, PAN SHENG, HU LIN, LIU XIANG, ZHOU LU-WEI <br/><p>By measuring the dielectric properties,we have found experimentally that the studied ER fluids underwent interfacial polarization and showed nonlinear dielectric properties under high AC field.Considering the dynamical shear stress to be similar to the high field dielectric spectra of the ER fluids,we have established a relation of dynamical shear stress to the high field dielectric spectra of the ER fluids and obtained the lower response times of rheology for two ER fluids.furthermore,it is found the dynamical shear stress of the NaY zeolite ER fluids was related to the intensity of its nonlinear THG,and the humidity of a semiconductor polymer has no effect on the rheological response.The experiment findings have been illustrated.</p> <br/>Acta Physica Sinica. 1997 46(2): 314-323. Published 1997-01-05 Author(s): QIU ZHI-YONG, PAN SHENG, HU LIN, LIU XIANG, ZHOU LU-WEI <br/><p>By measuring the dielectric properties,we have found experimentally that the studied ER fluids underwent interfacial polarization and showed nonlinear dielectric properties under high AC field.Considering the dynamical shear stress to be similar to the high field dielectric spectra of the ER fluids,we have established a relation of dynamical shear stress to the high field dielectric spectra of the ER fluids and obtained the lower response times of rheology for two ER fluids.furthermore,it is found the dynamical shear stress of the NaY zeolite ER fluids was related to the intensity of its nonlinear THG,and the humidity of a semiconductor polymer has no effect on the rheological response.The experiment findings have been illustrated.</p> <br/>Acta Physica Sinica. 1997 46(2): 314-323. Published 1997-01-05 RELATIONS BETWEEN RHEOLOGICAL RESPONSES OF ER FLUIDS TO HIGH AC FIELD AND THEIR NON LINEAR DIELECTRIC PROPERTIES QIU ZHI-YONG, PAN SHENG, HU LIN, LIU XIANG, ZHOU LU-WEI 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 314-323. article doi:10.7498/aps.46.314 10.7498/aps.46.314 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.314 314-323 //www.getgobooth.com/en/article/doi/10.7498/aps.46.324 Author(s): WU JIAN-QIANG, LIU SHENG-GANG, MO YUAN-LONG <br/><p>By use of the self-consistent linear field theory, three-dimensional perturbation of electrons　affected by the perturbed electromagnetic fields is discussed. And Cherenkov radiations excited by a thin annular relativistic electron beam in a unmagnetized-plasma-filled, dielectric lined slow-wave waveguide are analysed. The dispersion equation and the wave growth rate of the interaction of the electron beam to the waveguide modes with arbitrary azimuthal mode number are derived. It′s clearly shown that the Cherenkov radiation results from the coupling of the waveguide mode in the unmagnetized-plasma-filled, dielectric lined slow-wave waveguide to the beam mode via the electron beam. Finally, the effects of plasma density on the dispersion relation and the wave growth rate are calculated and discussed.</p> <br/>Acta Physica Sinica. 1997 46(2): 324-331. Published 1997-01-05 Author(s): WU JIAN-QIANG, LIU SHENG-GANG, MO YUAN-LONG <br/><p>By use of the self-consistent linear field theory, three-dimensional perturbation of electrons　affected by the perturbed electromagnetic fields is discussed. And Cherenkov radiations excited by a thin annular relativistic electron beam in a unmagnetized-plasma-filled, dielectric lined slow-wave waveguide are analysed. The dispersion equation and the wave growth rate of the interaction of the electron beam to the waveguide modes with arbitrary azimuthal mode number are derived. It′s clearly shown that the Cherenkov radiation results from the coupling of the waveguide mode in the unmagnetized-plasma-filled, dielectric lined slow-wave waveguide to the beam mode via the electron beam. Finally, the effects of plasma density on the dispersion relation and the wave growth rate are calculated and discussed.</p> <br/>Acta Physica Sinica. 1997 46(2): 324-331. Published 1997-01-05 LINEAR THEORY OF UNMAGNETIZED PLASMA FILLED DIELECTRIC CHERENKOV MASER WU JIAN-QIANG, LIU SHENG-GANG, MO YUAN-LONG 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 324-331. article doi:10.7498/aps.46.324 10.7498/aps.46.324 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.324 324-331 //www.getgobooth.com/en/article/doi/10.7498/aps.46.332 Author(s): DU KUI, WANG YUAN-MING, WANG ZHONG-MING, ZHU SHI-XUE <br/><p>This paper is a systematic study of the real space dynamical electron diffraction involved in propagation calculation and sets down guidelines based on theoretical analysis for consistent and accurate computation for real space dynamical electron diffraction.</p> <br/>Acta Physica Sinica. 1997 46(2): 332-339. Published 1997-01-05 Author(s): DU KUI, WANG YUAN-MING, WANG ZHONG-MING, ZHU SHI-XUE <br/><p>This paper is a systematic study of the real space dynamical electron diffraction involved in propagation calculation and sets down guidelines based on theoretical analysis for consistent and accurate computation for real space dynamical electron diffraction.</p> <br/>Acta Physica Sinica. 1997 46(2): 332-339. Published 1997-01-05 THE ACCURATE CALCULATION AND ANALYSIS OF THE PROPAGATOR IN REAL SPACE DYNAMICAL ELECTRON DIFFRACTION CALCULATIONS DU KUI, WANG YUAN-MING, WANG ZHONG-MING, ZHU SHI-XUE 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 332-339. article doi:10.7498/aps.46.332 10.7498/aps.46.332 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.332 332-339 //www.getgobooth.com/en/article/doi/10.7498/aps.46.340 Author(s): ZI JIAN, ZHANG KAI-MING <br/><p>The vibrational properties of spherical nanocrystal Si were studied and the relation between the size and Raman shift was established. It was found that the size of porous Si, simulated by Si spheres, should be much smaller than commonly reported.</p> <br/>Acta Physica Sinica. 1997 46(2): 340-344. Published 1997-01-05 Author(s): ZI JIAN, ZHANG KAI-MING <br/><p>The vibrational properties of spherical nanocrystal Si were studied and the relation between the size and Raman shift was established. It was found that the size of porous Si, simulated by Si spheres, should be much smaller than commonly reported.</p> <br/>Acta Physica Sinica. 1997 46(2): 340-344. Published 1997-01-05 THEORETICAL STUDY ON THE SIZE OF POROUS Si ZI JIAN, ZHANG KAI-MING 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 340-344. article doi:10.7498/aps.46.340 10.7498/aps.46.340 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.340 340-344 //www.getgobooth.com/en/article/doi/10.7498/aps.46.345 Author(s): LIU JUN-MIN, ZHANG JIN-XIU <br/><p>In order to investigate the non-equilibrium features in first order phase transition driven by a linear temperature field, the equilibrium free energy of the phase transition system was modified with an additional term, which is related to dη/dT or dη/dt. On the basis of the numerical solutions, the asymmetrical hysteresis behavior has been discussed.</p> <br/>Acta Physica Sinica. 1997 46(2): 345-352. Published 1997-01-05 Author(s): LIU JUN-MIN, ZHANG JIN-XIU <br/><p>In order to investigate the non-equilibrium features in first order phase transition driven by a linear temperature field, the equilibrium free energy of the phase transition system was modified with an additional term, which is related to dη/dT or dη/dt. On the basis of the numerical solutions, the asymmetrical hysteresis behavior has been discussed.</p> <br/>Acta Physica Sinica. 1997 46(2): 345-352. Published 1997-01-05 A NON EQUILIBRIUM MEAN FIELD THEORY ABOUT THERMALLY INDUCED FIRST ORDER PHASE TRANSITION LIU JUN-MIN, ZHANG JIN-XIU 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 345-352. article doi:10.7498/aps.46.345 10.7498/aps.46.345 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.345 345-352 //www.getgobooth.com/en/article/doi/10.7498/aps.46.353 Author(s): MA YUN-SHENG, WU CHANG-QIN, SUN XIN, FU RONG-TANG, FU ROU-LI, ZHU JUN-HAO <br/><p>The effect of electron-electron interaction on the localization of soliton is studied. Because the conducting polymer possesses wide bandwidth, the Hubbard model is no longer a suitable approximation. It is needed to use a screened Coulomb potential to describe the e-e interaction. Our theory shows that the screening plays a key role in the effect of e-e interaction on the localization of soliton: in weak screening, the localization of soliton will be enhanced by the e-e interaction; in strong screening, it will be reduced. In the end, the physical reason of above-mentioned results is explained by analysing the relation between screening and electron correlation.</p> <br/>Acta Physica Sinica. 1997 46(2): 353-362. Published 1997-01-05 Author(s): MA YUN-SHENG, WU CHANG-QIN, SUN XIN, FU RONG-TANG, FU ROU-LI, ZHU JUN-HAO <br/><p>The effect of electron-electron interaction on the localization of soliton is studied. Because the conducting polymer possesses wide bandwidth, the Hubbard model is no longer a suitable approximation. It is needed to use a screened Coulomb potential to describe the e-e interaction. Our theory shows that the screening plays a key role in the effect of e-e interaction on the localization of soliton: in weak screening, the localization of soliton will be enhanced by the e-e interaction; in strong screening, it will be reduced. In the end, the physical reason of above-mentioned results is explained by analysing the relation between screening and electron correlation.</p> <br/>Acta Physica Sinica. 1997 46(2): 353-362. Published 1997-01-05 ELECTRON ELECTRON INTERACTION AND SOLITON EXCITATION(Ⅰ)——THE EFFECT OF ELECTRON CORRELATION ON THE LOCALIZATION OF SOLITON MA YUN-SHENG, WU CHANG-QIN, SUN XIN, FU RONG-TANG, FU ROU-LI, ZHU JUN-HAO 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 353-362. article doi:10.7498/aps.46.353 10.7498/aps.46.353 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.353 353-362 //www.getgobooth.com/en/article/doi/10.7498/aps.46.363 Author(s): MA YUN-SHENG, WU CHANG-QIN, SUN XIN, FU RONG-TANG, FU ROU-LI, YE HONG-JUAN <br/><p>Does electron interaction enhance or reduce the creation energy of soliton? The results based on different theories conflict with each other. In this paper, the reason for such conflict has been revealed and a new method is proposed to calculate the creation energy of soliton (only intensive quantities are involved in calculation). Our result shows: the electron interaction enhances the creation energy of soliton, but the enhancement of the soliton is less than that of-e-h pair.</p> <br/>Acta Physica Sinica. 1997 46(2): 363-369. Published 1997-01-05 Author(s): MA YUN-SHENG, WU CHANG-QIN, SUN XIN, FU RONG-TANG, FU ROU-LI, YE HONG-JUAN <br/><p>Does electron interaction enhance or reduce the creation energy of soliton? The results based on different theories conflict with each other. In this paper, the reason for such conflict has been revealed and a new method is proposed to calculate the creation energy of soliton (only intensive quantities are involved in calculation). Our result shows: the electron interaction enhances the creation energy of soliton, but the enhancement of the soliton is less than that of-e-h pair.</p> <br/>Acta Physica Sinica. 1997 46(2): 363-369. Published 1997-01-05 ELECTRON ELECTRON INTERACTION AND SOLITON EXCITATION(Ⅱ)——THE EFFECT OF ELECTRON CORRELATION ON THE CREATION ENERGY OF SOLITON MA YUN-SHENG, WU CHANG-QIN, SUN XIN, FU RONG-TANG, FU ROU-LI, YE HONG-JUAN 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 363-369. article doi:10.7498/aps.46.363 10.7498/aps.46.363 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.363 363-369 //www.getgobooth.com/en/article/doi/10.7498/aps.46.370 Author(s): SHI XIAO-HONG, LIU PU-LIN, GONG DA-WEI, CHEN ZHANG-HAI, SHI GUO-LIANG, SHEN XUE-CHU <br/><p>The 2p± and 3p± excited lines of P donors in Si0.92Ge0.08 epitaxial layer have been observed using photothermal ionization spectroscopy.The ionization energy of P in Si0.92Ge0.08 is 45.51meV according to effective mass approach.The spectral lines of P in Si1-xGex compared with those in pure Si apparently broaden due to alloy disorder effect.</p> <br/>Acta Physica Sinica. 1997 46(2): 370-374. Published 1997-01-05 Author(s): SHI XIAO-HONG, LIU PU-LIN, GONG DA-WEI, CHEN ZHANG-HAI, SHI GUO-LIANG, SHEN XUE-CHU <br/><p>The 2p± and 3p± excited lines of P donors in Si0.92Ge0.08 epitaxial layer have been observed using photothermal ionization spectroscopy.The ionization energy of P in Si0.92Ge0.08 is 45.51meV according to effective mass approach.The spectral lines of P in Si1-xGex compared with those in pure Si apparently broaden due to alloy disorder effect.</p> <br/>Acta Physica Sinica. 1997 46(2): 370-374. Published 1997-01-05 PHOTOTHERMAL IONIZATION SPECTROSCOPY FOR SHALLOW DONOR IN Si1-xGex EPITAXIAL LAYER SHI XIAO-HONG, LIU PU-LIN, GONG DA-WEI, CHEN ZHANG-HAI, SHI GUO-LIANG, SHEN XUE-CHU 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 370-374. article doi:10.7498/aps.46.370 10.7498/aps.46.370 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.370 370-374 //www.getgobooth.com/en/article/doi/10.7498/aps.46.375 Author(s): ZHENG ZHEN-HUA, MIAO RONG-ZHI, CHEN YU <br/><p>Carrier transport through an n-type semiconductor grain boundary with a double Mott barrier consisting carrier depletion layers,acceptor defect layers (ACLs) on grain surface and negative-charged interface by trapping of majority carriers is studied.The effect of ACL on the barrier,current,nonlinearity and capacitance is especially treated.The change of barrier under bias governs transport properties,and ascertains the existance of pre-breakdown,breakdown and upturn regions.ACLs result in a change of barrier and its intensifying decline under bias,and thus enhance the current change and nonlinearity,and largely determine the leakage current.And ACLs reduce capacitance at high frequency by broaden barrier but increase capacitance peak originated from the resonant response of interface charge under bias.</p> <br/>Acta Physica Sinica. 1997 46(2): 375-386. Published 1997-01-05 Author(s): ZHENG ZHEN-HUA, MIAO RONG-ZHI, CHEN YU <br/><p>Carrier transport through an n-type semiconductor grain boundary with a double Mott barrier consisting carrier depletion layers,acceptor defect layers (ACLs) on grain surface and negative-charged interface by trapping of majority carriers is studied.The effect of ACL on the barrier,current,nonlinearity and capacitance is especially treated.The change of barrier under bias governs transport properties,and ascertains the existance of pre-breakdown,breakdown and upturn regions.ACLs result in a change of barrier and its intensifying decline under bias,and thus enhance the current change and nonlinearity,and largely determine the leakage current.And ACLs reduce capacitance at high frequency by broaden barrier but increase capacitance peak originated from the resonant response of interface charge under bias.</p> <br/>Acta Physica Sinica. 1997 46(2): 375-386. Published 1997-01-05 CARRIER TRANSPORT THROUGH A SEMICONDUCTOR GRAIN BOUNDARY WITH A DOUBLE MOTT BARRIER ZHENG ZHEN-HUA, MIAO RONG-ZHI, CHEN YU 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 375-386. article doi:10.7498/aps.46.375 10.7498/aps.46.375 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.375 375-386 //www.getgobooth.com/en/article/doi/10.7498/aps.46.387 Author(s): WU JUN-QIAO, WANG ZHI-JUN, WU KE, ZHANG JIN-LONG, LI CHUAN-YI, YIN DAO-LE, ZHOU XI-HUANG, GU ZHEN-NAN, JIN ZHAO-XIA <br/><p>In situ DC resistance measurements were performed on semicontinuous niobium and silver films,which were made on mica and fullerene substrates in an ultra-high-vacuum chamber.Right after the interruption of the deposition,we investigated the changes (relaxation) of the sample resistance on a time scale of about 10 minutes.Resistance increase was observed for Nb/mica and Ag/C60 systems,and decrease for Ag/mica system.The relaxation is sensitive to substrate temperature and film thickness.We suggest that the edge diffusion and mergence of islands due to thermomigration of the metal atoms are responsible for the resistance relaxation.The intensity and direction of the relaxation reflect the interfacial activity of the metal/substrate system.The heterogeneities on substrate may also play an important role during this process.The analysis is presented from the angle of atom-migration and of thermodynamic evolution.</p> <br/>Acta Physica Sinica. 1997 46(2): 387-392. Published 1997-01-05 Author(s): WU JUN-QIAO, WANG ZHI-JUN, WU KE, ZHANG JIN-LONG, LI CHUAN-YI, YIN DAO-LE, ZHOU XI-HUANG, GU ZHEN-NAN, JIN ZHAO-XIA <br/><p>In situ DC resistance measurements were performed on semicontinuous niobium and silver films,which were made on mica and fullerene substrates in an ultra-high-vacuum chamber.Right after the interruption of the deposition,we investigated the changes (relaxation) of the sample resistance on a time scale of about 10 minutes.Resistance increase was observed for Nb/mica and Ag/C60 systems,and decrease for Ag/mica system.The relaxation is sensitive to substrate temperature and film thickness.We suggest that the edge diffusion and mergence of islands due to thermomigration of the metal atoms are responsible for the resistance relaxation.The intensity and direction of the relaxation reflect the interfacial activity of the metal/substrate system.The heterogeneities on substrate may also play an important role during this process.The analysis is presented from the angle of atom-migration and of thermodynamic evolution.</p> <br/>Acta Physica Sinica. 1997 46(2): 387-392. Published 1997-01-05 RESISTANCE RELAXATION OF THIN METAL FILMS ON MICA AND FULLERENE SUBSTRATES WU JUN-QIAO, WANG ZHI-JUN, WU KE, ZHANG JIN-LONG, LI CHUAN-YI, YIN DAO-LE, ZHOU XI-HUANG, GU ZHEN-NAN, JIN ZHAO-XIA 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 387-392. article doi:10.7498/aps.46.387 10.7498/aps.46.387 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.387 387-392 //www.getgobooth.com/en/article/doi/10.7498/aps.46.393 Author(s): ZHANG MAN-HONG, ZHU BANG-FEN, HUANG QI, WANG WEN-XIN, ZHOU JUN-MING <br/><p>The method of the plane-wave expansion of envelope functions,as applied to calculating the subband structures in superlattices,is extended to the 8-band k·p Hamiltonian,in which both Γc1 and Γv15 bands are included.In this method,we can easily take into account of the effects of the nonparabolicity,the discontinuity of the effective masses,the spin-orbit splitting and the inversion asymmetry on subbands.Using this method,we have computed the electronic structure and the optical transition probability of two superlattice systems,in which the in-plane polarized interconduction subband transitions were observed.Our results show that the probability of such transitions is very small.It is thus expected that there might be other machanism to be responsible for the experimental results.</p> <br/>Acta Physica Sinica. 1997 46(2): 393-399. Published 1997-01-05 Author(s): ZHANG MAN-HONG, ZHU BANG-FEN, HUANG QI, WANG WEN-XIN, ZHOU JUN-MING <br/><p>The method of the plane-wave expansion of envelope functions,as applied to calculating the subband structures in superlattices,is extended to the 8-band k·p Hamiltonian,in which both Γc1 and Γv15 bands are included.In this method,we can easily take into account of the effects of the nonparabolicity,the discontinuity of the effective masses,the spin-orbit splitting and the inversion asymmetry on subbands.Using this method,we have computed the electronic structure and the optical transition probability of two superlattice systems,in which the in-plane polarized interconduction subband transitions were observed.Our results show that the probability of such transitions is very small.It is thus expected that there might be other machanism to be responsible for the experimental results.</p> <br/>Acta Physica Sinica. 1997 46(2): 393-399. Published 1997-01-05 EXAMINING THE IN PLANE POLARIZED INTERCONDUCTION SUBBAND TRANSITION USING GENERALIZED PLANE WAVE METHOD ZHANG MAN-HONG, ZHU BANG-FEN, HUANG QI, WANG WEN-XIN, ZHOU JUN-MING 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 393-399. article doi:10.7498/aps.46.393 10.7498/aps.46.393 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.393 393-399 //www.getgobooth.com/en/article/doi/10.7498/aps.46.400 Author(s): LI GENG-YING, PAN TAO, XIA XIAO-JIAN <br/><p>A new method,which involves measurement of the piezoelectricity by nuclear quadrupole resonance spectrometer,is proposed.The spectral intensity of a quartz crystal versus the strength of the excitation pulse,the pulse width and the resonance offset is studied in detail.The experimental results demonstrate that the piezoelectric resonance signal originating from samples located tens of centimeter away from the probe may be detected in a time scale of seconds.This technique provides potential for more extensive investigation and application of the piezoelectric materials.</p> <br/>Acta Physica Sinica. 1997 46(2): 400-405. Published 1997-01-05 Author(s): LI GENG-YING, PAN TAO, XIA XIAO-JIAN <br/><p>A new method,which involves measurement of the piezoelectricity by nuclear quadrupole resonance spectrometer,is proposed.The spectral intensity of a quartz crystal versus the strength of the excitation pulse,the pulse width and the resonance offset is studied in detail.The experimental results demonstrate that the piezoelectric resonance signal originating from samples located tens of centimeter away from the probe may be detected in a time scale of seconds.This technique provides potential for more extensive investigation and application of the piezoelectric materials.</p> <br/>Acta Physica Sinica. 1997 46(2): 400-405. Published 1997-01-05 REMOTE MEASUREMENT OF PIEZOEFFECT LI GENG-YING, PAN TAO, XIA XIAO-JIAN 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 400-405. article doi:10.7498/aps.46.400 10.7498/aps.46.400 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.400 400-405 //www.getgobooth.com/en/article/doi/10.7498/aps.46.406 Author(s): WU YI-CHU, ZHU ZHI-YING, YOSHIKO ITOH, YASUO ITO <br/><p>The interaction between hydrogen and defects in annealed,473K tempered and cold-rolled nickel samples has been investigated by positron lifetime and Doppler broadening measurements.Experimental results show that there has been no effect of hydrogen-charging on the nickel samples containing only dislocations,while in the samples containing vacancies the effect was evident.A long-lifetime component appeared for the latter,which may indicate that the hydrogen-vacancy composite is also the center of vacancy agglomeration.</p> <br/>Acta Physica Sinica. 1997 46(2): 406-410. Published 1997-01-05 Author(s): WU YI-CHU, ZHU ZHI-YING, YOSHIKO ITOH, YASUO ITO <br/><p>The interaction between hydrogen and defects in annealed,473K tempered and cold-rolled nickel samples has been investigated by positron lifetime and Doppler broadening measurements.Experimental results show that there has been no effect of hydrogen-charging on the nickel samples containing only dislocations,while in the samples containing vacancies the effect was evident.A long-lifetime component appeared for the latter,which may indicate that the hydrogen-vacancy composite is also the center of vacancy agglomeration.</p> <br/>Acta Physica Sinica. 1997 46(2): 406-410. Published 1997-01-05 POSITRON LIFETIME AND DOPPLER BROADENING TECHNIQUES STUDIES ON THE INTERACTION BETWEEN HYDROGEN AND DEFECTS IN NICKEL WU YI-CHU, ZHU ZHI-YING, YOSHIKO ITOH, YASUO ITO 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 406-410. article doi:10.7498/aps.46.406 10.7498/aps.46.406 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.406 406-410 //www.getgobooth.com/en/article/doi/10.7498/aps.46.411 Author(s): XU WEI-MING <br/><p>The magnetic order in Cr75(Fe0.67Mn0.33)25 alloy prepared under different annealing conditions is studied by means of 57Fe Mssbauer spectroscopy and bulk magnetization measurements.We get the conclusion that the short-range chemical order plays a dominant role in the magnetic order of the alloy.The heat treatment process affects the Cr(Mn)-rich,Fe-rich clusters in the alloy,thus increases both the ferromagnetic and antiferromagnetic transition temperature greatly.The Cr(Mn),Fe clusters lead to the magnetic phase segregation in the alloy.</p> <br/>Acta Physica Sinica. 1997 46(2): 411-416. Published 1997-01-05 Author(s): XU WEI-MING <br/><p>The magnetic order in Cr75(Fe0.67Mn0.33)25 alloy prepared under different annealing conditions is studied by means of 57Fe Mssbauer spectroscopy and bulk magnetization measurements.We get the conclusion that the short-range chemical order plays a dominant role in the magnetic order of the alloy.The heat treatment process affects the Cr(Mn)-rich,Fe-rich clusters in the alloy,thus increases both the ferromagnetic and antiferromagnetic transition temperature greatly.The Cr(Mn),Fe clusters lead to the magnetic phase segregation in the alloy.</p> <br/>Acta Physica Sinica. 1997 46(2): 411-416. Published 1997-01-05 INFLUENCE OF HEAT TREATMENT PROCESS ON MAGNETIC ORDER IN CrCr75(Fe0.67Mn0.33)25 ALLOYS XU WEI-MING 1997-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(2): 411-416. article doi:10.7498/aps.46.411 10.7498/aps.46.411 Acta Physica Sinica 46 2 1997-01-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.411 411-416

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