//www.getgobooth.com/ 必威体育下载 daily 15 2024-08-20 10:33:38 apsoffice@iphy.ac.cn apsoffice@iphy.ac.cn 2024-08-20 10:33:38 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.32.1361 Author(s): GE CHUAN-ZHEN, WANG YOU-TAO, WANG JIAN-WEN, FENG DUAN <br/><p>We have made direct observations of dislocation substructure in LiNbO3 and LiTaO3 single crystals decorated by gold particles by mean of transmission optical microscopy and ultra-microscopy. The three dimentional features of the subboundaries have been disclosed and the nature of subboundaries are determined with stereographic analysis, and quantitatively verified by Frank's formula.The analysis of dislocation networks and junctions of subboundaries shows that the Burgers vectors of dislocations in these crystals are , the smallest lattice vector;1/3, the next smallest lattice vector, and 1/3 , the short diagonal of therhombohedral cell.</p> <br/>Acta Physica Sinica. 1983 32(11): 1361-1368. Published 2005-07-21 Author(s): GE CHUAN-ZHEN, WANG YOU-TAO, WANG JIAN-WEN, FENG DUAN <br/><p>We have made direct observations of dislocation substructure in LiNbO3 and LiTaO3 single crystals decorated by gold particles by mean of transmission optical microscopy and ultra-microscopy. The three dimentional features of the subboundaries have been disclosed and the nature of subboundaries are determined with stereographic analysis, and quantitatively verified by Frank's formula.The analysis of dislocation networks and junctions of subboundaries shows that the Burgers vectors of dislocations in these crystals are , the smallest lattice vector;1/3, the next smallest lattice vector, and 1/3 , the short diagonal of therhombohedral cell.</p> <br/>Acta Physica Sinica. 1983 32(11): 1361-1368. Published 2005-07-21 A STUDY OF DISLOCATION STRUCTURE OF SUBBOUND- ARIES IN LiNbO3 AND LiTaO3, SINGLE CRYSTALS GE CHUAN-ZHEN, WANG YOU-TAO, WANG JIAN-WEN, FENG DUAN 2005-07-21 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(11): 1361-1368. article doi:10.7498/aps.32.1361 10.7498/aps.32.1361 Acta Physica Sinica 32 11 2005-07-21 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1361 1361-1368 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1369 Author(s): LIU JI-ZHE, LU MU, HAN SHI-YING, ZHAI HONG-RU <br/><p>In this paper, we studied the substitution of Fe3+ ions in BaFe12O19 crystal by Co2+-Ti4+ and Cu2+-Nb5+ ions. Two systems of single cry stals of BaFe12-2xCoxTixO19(with x=0, 0.04, 0.09, 0.13, 0.27, 0.68) and BaFe12-x(Nb1/3Cu2/3)xO19(with x = 0, 0.28, 0.44, 0.60) were grown from Bi2O3 melts. Magnetization a and anisotropy constant K1 of the above samples were measured in the temperature range of 100-300K. For the substitution with Co2+-Ti4+ ions, it was found that when x = 0.09 σ and K1 increased slightly with x at the beginning and decreased rapidly when x &lt; 0.09 until K1→ O at x≈ 1.1. In the case of substitutions with Cu2+-Nb5+, the σ value was nearly the same in the studied compositions and showed a slightly increasing trend with increasing x; while K1 decreased monotonously with x. Our results were qualitatively discussed with the model of site occupation of substitution ions in the M-type hexagonal ferrite.</p> <br/>Acta Physica Sinica. 1983 32(11): 1369-1375. Published 2005-07-21 Author(s): LIU JI-ZHE, LU MU, HAN SHI-YING, ZHAI HONG-RU <br/><p>In this paper, we studied the substitution of Fe3+ ions in BaFe12O19 crystal by Co2+-Ti4+ and Cu2+-Nb5+ ions. Two systems of single cry stals of BaFe12-2xCoxTixO19(with x=0, 0.04, 0.09, 0.13, 0.27, 0.68) and BaFe12-x(Nb1/3Cu2/3)xO19(with x = 0, 0.28, 0.44, 0.60) were grown from Bi2O3 melts. Magnetization a and anisotropy constant K1 of the above samples were measured in the temperature range of 100-300K. For the substitution with Co2+-Ti4+ ions, it was found that when x = 0.09 σ and K1 increased slightly with x at the beginning and decreased rapidly when x &lt; 0.09 until K1→ O at x≈ 1.1. In the case of substitutions with Cu2+-Nb5+, the σ value was nearly the same in the studied compositions and showed a slightly increasing trend with increasing x; while K1 decreased monotonously with x. Our results were qualitatively discussed with the model of site occupation of substitution ions in the M-type hexagonal ferrite.</p> <br/>Acta Physica Sinica. 1983 32(11): 1369-1375. Published 2005-07-21 STUDY OF SUBSTITUTION OF Fe3+ IONS IN BaFe12O19 CRYSTAL BY Co2+-Ti4+ AND Cu2+-Nb5+ IONS LIU JI-ZHE, LU MU, HAN SHI-YING, ZHAI HONG-RU 2005-07-21 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(11): 1369-1375. article doi:10.7498/aps.32.1369 10.7498/aps.32.1369 Acta Physica Sinica 32 11 2005-07-21 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1369 1369-1375 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1376 Author(s): SU FANG, CHEN LI-QUAN <br/><p>The effect of additive Al2O3 on both the formation of amorphous B2O3-0.7Li2O-0.7LiCl and it's ion conduction property have been studied. It has been found that rather large slab of amorphous material could be easily prepared by pouring directly the melt contained suitable amount of additive Al2O3 onto a copper plate at room temperature without using liquid nitrogen.The additive A12O3 decreases slightly the conductivity of amorphous B2O3-0.7Li2O-0.7LiCl but in high temperature range this effect is far less obvious because of the activation energy for the amorphous containing Al2O3 is slightly larger than that of pure one. It has been shown that Al2O3 = 0.03 is the optimum content which makes the preparation of amorphous more easily and dose not seriously influence the conductivity.</p> <br/>Acta Physica Sinica. 1983 32(11): 1376-1382. Published 2005-07-21 Author(s): SU FANG, CHEN LI-QUAN <br/><p>The effect of additive Al2O3 on both the formation of amorphous B2O3-0.7Li2O-0.7LiCl and it's ion conduction property have been studied. It has been found that rather large slab of amorphous material could be easily prepared by pouring directly the melt contained suitable amount of additive Al2O3 onto a copper plate at room temperature without using liquid nitrogen.The additive A12O3 decreases slightly the conductivity of amorphous B2O3-0.7Li2O-0.7LiCl but in high temperature range this effect is far less obvious because of the activation energy for the amorphous containing Al2O3 is slightly larger than that of pure one. It has been shown that Al2O3 = 0.03 is the optimum content which makes the preparation of amorphous more easily and dose not seriously influence the conductivity.</p> <br/>Acta Physica Sinica. 1983 32(11): 1376-1382. Published 2005-07-21 AMORPHOUS LITHIUM IONIC CONDUCTOR B2O3-0.7Li2O-0.7LiCl-xAl2O3 SU FANG, CHEN LI-QUAN 2005-07-21 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(11): 1376-1382. article doi:10.7498/aps.32.1376 10.7498/aps.32.1376 Acta Physica Sinica 32 11 2005-07-21 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1376 1376-1382 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1383 Author(s): XU ZHI-ZHAN, YU WEI <br/><p>The field structure of resonance absorption and density profile steepening in laser plasmas is studied by means of a new analytical method. The resulting absorption coefficients can be expressed by elementary functions, and are in good agreement with numerical calculations. In addition, the analytic calculations for steady state, steepened density profile are also well consistent with the results obtained by using microwave plasma experiments and numerical simulation.</p> <br/>Acta Physica Sinica. 1983 32(11): 1383-1391. Published 2005-07-21 Author(s): XU ZHI-ZHAN, YU WEI <br/><p>The field structure of resonance absorption and density profile steepening in laser plasmas is studied by means of a new analytical method. The resulting absorption coefficients can be expressed by elementary functions, and are in good agreement with numerical calculations. In addition, the analytic calculations for steady state, steepened density profile are also well consistent with the results obtained by using microwave plasma experiments and numerical simulation.</p> <br/>Acta Physica Sinica. 1983 32(11): 1383-1391. Published 2005-07-21 THE FIELD STRUCTURE OF RESONANCE ABSORPTION AND DENSITY PROFILE STEEPENING XU ZHI-ZHAN, YU WEI 2005-07-21 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(11): 1383-1391. article doi:10.7498/aps.32.1383 10.7498/aps.32.1383 Acta Physica Sinica 32 11 2005-07-21 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1383 1383-1391 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1392 Author(s): YAO XIN-ZI <br/><p>The second-order electron density fluctuation in homogeneous unmagnetized plasma is calculated by means of dynamical method. The third-order non-linear susceptibility resulting from interaction of three waves in plasma and the scattered power of K4=K1-K2+K3,ω4=ω1-ω2+ω3 is obtained. As compared with the normal non-coherent Thomson scattering, the scattered signal is very strong. So the coherent four-photon scattering can be taken as one of the important method in plasma diagnostics. It is showed that the result of reference [4] is a simplified form of the result obtained here.</p> <br/>Acta Physica Sinica. 1983 32(11): 1392-1397. Published 2005-07-21 Author(s): YAO XIN-ZI <br/><p>The second-order electron density fluctuation in homogeneous unmagnetized plasma is calculated by means of dynamical method. The third-order non-linear susceptibility resulting from interaction of three waves in plasma and the scattered power of K4=K1-K2+K3,ω4=ω1-ω2+ω3 is obtained. As compared with the normal non-coherent Thomson scattering, the scattered signal is very strong. So the coherent four-photon scattering can be taken as one of the important method in plasma diagnostics. It is showed that the result of reference [4] is a simplified form of the result obtained here.</p> <br/>Acta Physica Sinica. 1983 32(11): 1392-1397. Published 2005-07-21 COHERENT FOUR-PHOTON SCATTERING IN PLASMA YAO XIN-ZI 2005-07-21 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(11): 1392-1397. article doi:10.7498/aps.32.1392 10.7498/aps.32.1392 Acta Physica Sinica 32 11 2005-07-21 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1392 1392-1397 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1398 Author(s): SHI BING-REN <br/><p>The stability of a high-beta tokamak plasma having circular crosssection against the high-n ballooning modes is reconsidered. In the high-beta case, the poloidal magnetic field yields a rather strong driving term to the ballooning modes, leading to a substantial distortion of the structure of the second stability region. The various effects of the magnetic shear, pressure gradient and the poloidal magnetic field parameter on the eigenfunctions and the eigenvalues of these modes are calculated. The results obtained give a comprehensive indication in predicting the ideal MHD ballooning modes in circular tokamaks.</p> <br/>Acta Physica Sinica. 1983 32(11): 1398-1406. Published 2005-07-21 Author(s): SHI BING-REN <br/><p>The stability of a high-beta tokamak plasma having circular crosssection against the high-n ballooning modes is reconsidered. In the high-beta case, the poloidal magnetic field yields a rather strong driving term to the ballooning modes, leading to a substantial distortion of the structure of the second stability region. The various effects of the magnetic shear, pressure gradient and the poloidal magnetic field parameter on the eigenfunctions and the eigenvalues of these modes are calculated. The results obtained give a comprehensive indication in predicting the ideal MHD ballooning modes in circular tokamaks.</p> <br/>Acta Physica Sinica. 1983 32(11): 1398-1406. Published 2005-07-21 ON THE SECOND STABILITY REGION OF TOKAMAK PLASMAS AGAINST HIGH-n BALLOONING MODES SHI BING-REN 2005-07-21 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(11): 1398-1406. article doi:10.7498/aps.32.1398 10.7498/aps.32.1398 Acta Physica Sinica 32 11 2005-07-21 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1398 1398-1406 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1407 Author(s): YIN YUAN-ZHAO <br/><p>In this paper, a detailed analysis on the operating mechanism and parameter properties of free electron laser amplifier (FELA) in the case of small signal is presented. The results show that FELA is in essence the interaction between the electron beam and the fast cyclotron wave. The cyclotron resonance condition of electron motion in the uniform axial and periodic transverse static magnetic fields significantly influences the interaction process. We have calculated numerically the central operating frequency, band width, small signal gain and wave number of the amplified electromagnetic wave as functions of the parameters of the amplifier (such as the voltage and current density of the electron beam, the intensities of axial and transverse static magnetic field). The way to optimize the design of FELA is also suggested. It is possible to obtain a small signal gain of 10-2 cm-1 with enough band width in the millimeter and submillimeter range of weve length following a proper design.</p> <br/>Acta Physica Sinica. 1983 32(11): 1407-1415. Published 2005-07-21 Author(s): YIN YUAN-ZHAO <br/><p>In this paper, a detailed analysis on the operating mechanism and parameter properties of free electron laser amplifier (FELA) in the case of small signal is presented. The results show that FELA is in essence the interaction between the electron beam and the fast cyclotron wave. The cyclotron resonance condition of electron motion in the uniform axial and periodic transverse static magnetic fields significantly influences the interaction process. We have calculated numerically the central operating frequency, band width, small signal gain and wave number of the amplified electromagnetic wave as functions of the parameters of the amplifier (such as the voltage and current density of the electron beam, the intensities of axial and transverse static magnetic field). The way to optimize the design of FELA is also suggested. It is possible to obtain a small signal gain of 10-2 cm-1 with enough band width in the millimeter and submillimeter range of weve length following a proper design.</p> <br/>Acta Physica Sinica. 1983 32(11): 1407-1415. Published 2005-07-21 THEORETICAL ANALYSIS OF FREE ELECTRON LASER AMPLIFIER YIN YUAN-ZHAO 2005-07-21 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(11): 1407-1415. article doi:10.7498/aps.32.1407 10.7498/aps.32.1407 Acta Physica Sinica 32 11 2005-07-21 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1407 1407-1415 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1416 Author(s): YANG ZHENQ-JU <br/><p>In our treatment, crystals are considered as elastic continual, so that any strained vol-um element can be simulated by an elastic dipole. The effective moment of the dipole is found and classified into a permanent part and an induced part. The former depends upon the elastic property of the volum element and the surrounding matrix; while the latter defends upon the strain state of the medium. These two parts of the effective, moment make the medium aquires paraelastic and dielastic charateristies respectively.The displacement field produced by elastic dipole in an isotropic, unbounded, elastic continuum is given. Taking relaxation into account, we obtain the expression for interaction between elastic dipole and the strain field produced by other sources. This expression is simply the Kroner's formula with by some higher order terms added to it. In treating the problems of the interaction between the dislocation and a solute atom and that between two symmetrical centers, the results agree in general with the previous studies but with some higher order correction terms included.</p> <br/>Acta Physica Sinica. 1983 32(11): 1416-1425. Published 2005-07-21 Author(s): YANG ZHENQ-JU <br/><p>In our treatment, crystals are considered as elastic continual, so that any strained vol-um element can be simulated by an elastic dipole. The effective moment of the dipole is found and classified into a permanent part and an induced part. The former depends upon the elastic property of the volum element and the surrounding matrix; while the latter defends upon the strain state of the medium. These two parts of the effective, moment make the medium aquires paraelastic and dielastic charateristies respectively.The displacement field produced by elastic dipole in an isotropic, unbounded, elastic continuum is given. Taking relaxation into account, we obtain the expression for interaction between elastic dipole and the strain field produced by other sources. This expression is simply the Kroner's formula with by some higher order terms added to it. In treating the problems of the interaction between the dislocation and a solute atom and that between two symmetrical centers, the results agree in general with the previous studies but with some higher order correction terms included.</p> <br/>Acta Physica Sinica. 1983 32(11): 1416-1425. Published 2005-07-21 THE ELASTIC DIPOLE MODEL OF STRAINED CRYSTALS YANG ZHENQ-JU 2005-07-21 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(11): 1416-1425. article doi:10.7498/aps.32.1416 10.7498/aps.32.1416 Acta Physica Sinica 32 11 2005-07-21 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1416 1416-1425 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1426 Author(s): SHI KANG-JIE <br/><p>If SU(2) potential Aμ, with Dμφ=?μφ+ Aμ×φ, can be expressed by n(xμ) with n ·n = 1 as Aμ= ?μn×n, we call it "deduced potential". Because Dμn = 0, it can be transformed into Abellian. Then, we find equivalent U/(l) potential and strength of field Fμv = Fμv ·n. This kind of Fμv (namely Ei and Bi) has the same specific properties and relations between E, B and n. Using this properties and relations, from the known strength of electric and magnetic field of monopole, we can construct a n = n(xμ) with n·n = 1. Then obtain the potential Aμ and its equivalent U(1) potential Cμ. In this way, we find a definite expression of potential for a moving monopole just like the Lienard-Wiechert potential for a moving charged particle. When monopole is at rest, the potential reduces to the famous Wu-Yang potential.</p> <br/>Acta Physica Sinica. 1983 32(11): 1426-1434. Published 2005-07-21 Author(s): SHI KANG-JIE <br/><p>If SU(2) potential Aμ, with Dμφ=?μφ+ Aμ×φ, can be expressed by n(xμ) with n ·n = 1 as Aμ= ?μn×n, we call it "deduced potential". Because Dμn = 0, it can be transformed into Abellian. Then, we find equivalent U/(l) potential and strength of field Fμv = Fμv ·n. This kind of Fμv (namely Ei and Bi) has the same specific properties and relations between E, B and n. Using this properties and relations, from the known strength of electric and magnetic field of monopole, we can construct a n = n(xμ) with n·n = 1. Then obtain the potential Aμ and its equivalent U(1) potential Cμ. In this way, we find a definite expression of potential for a moving monopole just like the Lienard-Wiechert potential for a moving charged particle. When monopole is at rest, the potential reduces to the famous Wu-Yang potential.</p> <br/>Acta Physica Sinica. 1983 32(11): 1426-1434. Published 2005-07-21 THE GAUGE POTENTIAL OF MOVING MONOPOLE SHI KANG-JIE 2005-07-21 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(11): 1426-1434. article doi:10.7498/aps.32.1426 10.7498/aps.32.1426 Acta Physica Sinica 32 11 2005-07-21 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1426 1426-1434 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1435 Author(s): ZHANG LI-YUAN <br/><p>By using McMillan's method, the superconducting proximity effect between a nonsim-ple metal thin film with negative U centers and a thin film of BCS superconductor is analyzed theoretically. It is shown that the superconductivity of this kind of sandwich can be enhanced by this proximity effect. In order to raise Tc, it is desirable to investigate this kind of superconducting materials consisting of S-U multilayers.</p> <br/>Acta Physica Sinica. 1983 32(11): 1435-1442. Published 2005-07-21 Author(s): ZHANG LI-YUAN <br/><p>By using McMillan's method, the superconducting proximity effect between a nonsim-ple metal thin film with negative U centers and a thin film of BCS superconductor is analyzed theoretically. It is shown that the superconductivity of this kind of sandwich can be enhanced by this proximity effect. In order to raise Tc, it is desirable to investigate this kind of superconducting materials consisting of S-U multilayers.</p> <br/>Acta Physica Sinica. 1983 32(11): 1435-1442. Published 2005-07-21 THE PROXIMITY EFFECT BETWEEN A NONSIMPLE METAL WITH-U CENTERS AND A BCS SUPERCONDUCTOR (I) ZHANG LI-YUAN 2005-07-21 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(11): 1435-1442. article doi:10.7498/aps.32.1435 10.7498/aps.32.1435 Acta Physica Sinica 32 11 2005-07-21 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1435 1435-1442 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1443 Author(s): ZHENG JIAN-XUAN, ZENG LING-MIN <br/><p>The gadolinium-copper phase diagram has been compicted by X-ray diffraction and differential thermal analysis. The allotropic change in the GdCu6 phase was observed at 735℃.In this system there exist four intermetallic Compouds: GdCu, GdCu2, GdCu5 and GdCu6. The intermetallic compound GdCu5 melts congruently at 932℃. The intermetallic compounds GdCu, GdCu2 and GdCu6 are formed by peritectic reactions at 759℃, 870℃ and 884℃, respectively. Two eutectic reactions occur: at 32 at% Cu and 668℃, 92 at% Cu and 875℃. Neither Gd in Cu nor Cu in Gd Shows any detectable solid solubility.</p> <br/>Acta Physica Sinica. 1983 32(11): 1443-1448. Published 2005-07-21 Author(s): ZHENG JIAN-XUAN, ZENG LING-MIN <br/><p>The gadolinium-copper phase diagram has been compicted by X-ray diffraction and differential thermal analysis. The allotropic change in the GdCu6 phase was observed at 735℃.In this system there exist four intermetallic Compouds: GdCu, GdCu2, GdCu5 and GdCu6. The intermetallic compound GdCu5 melts congruently at 932℃. The intermetallic compounds GdCu, GdCu2 and GdCu6 are formed by peritectic reactions at 759℃, 870℃ and 884℃, respectively. Two eutectic reactions occur: at 32 at% Cu and 668℃, 92 at% Cu and 875℃. Neither Gd in Cu nor Cu in Gd Shows any detectable solid solubility.</p> <br/>Acta Physica Sinica. 1983 32(11): 1443-1448. Published 2005-07-21 A PHASE DIAGRAM OF THE ALLOYS OF THE Gd-Cu BINARY SYSTEM ZHENG JIAN-XUAN, ZENG LING-MIN 2005-07-21 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(11): 1443-1448. article doi:10.7498/aps.32.1443 10.7498/aps.32.1443 Acta Physica Sinica 32 11 2005-07-21 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1443 1443-1448 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1449 Author(s): ZHENG JIAN-XUAN, NONG LIANG-QIN <br/><p>The binary phase diagram of the neodymium-copper system has been determined by means of X-ray powder diffraction, differential, thermal analysis (DTA) and metallographic methoa.In this system there exist five intermetallic compounds: NdCu, NdCu2, NdCu4, NdCu5 and NdCu6. The intermetallic compounds NdCu2 and NdCu6 melt congruently at 830℃ and 962℃, and the intermetallic compounds NdCu, NdCu4 and NdCu5 are formed by peritectic reactions at 602℃, 853℃ and 916℃, respectively. Three eutectic reactions occur: at 33 at% Cu and 478℃, 74 at% Cu and 760℃, 91 at% Cu and 874℃. Neither Nd in Cu nor Cu in Nd shows any detectable solid solubility. The solid solubility between intermetallic compounds is undetectable.</p> <br/>Acta Physica Sinica. 1983 32(11): 1449-1454. Published 2005-07-21 Author(s): ZHENG JIAN-XUAN, NONG LIANG-QIN <br/><p>The binary phase diagram of the neodymium-copper system has been determined by means of X-ray powder diffraction, differential, thermal analysis (DTA) and metallographic methoa.In this system there exist five intermetallic compounds: NdCu, NdCu2, NdCu4, NdCu5 and NdCu6. The intermetallic compounds NdCu2 and NdCu6 melt congruently at 830℃ and 962℃, and the intermetallic compounds NdCu, NdCu4 and NdCu5 are formed by peritectic reactions at 602℃, 853℃ and 916℃, respectively. Three eutectic reactions occur: at 33 at% Cu and 478℃, 74 at% Cu and 760℃, 91 at% Cu and 874℃. Neither Nd in Cu nor Cu in Nd shows any detectable solid solubility. The solid solubility between intermetallic compounds is undetectable.</p> <br/>Acta Physica Sinica. 1983 32(11): 1449-1454. Published 2005-07-21 A PHASE DIAGRAM OF THE ALLOYS OF THE Nd-Cu BINARY SYSTEM ZHENG JIAN-XUAN, NONG LIANG-QIN 2005-07-21 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(11): 1449-1454. article doi:10.7498/aps.32.1449 10.7498/aps.32.1449 Acta Physica Sinica 32 11 2005-07-21 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1449 1449-1454 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1455 Author(s): YANG YING-CHANG, HE WEN-WANG, LIN QIN, YANG JI-LIAN, ZHOU HUI-MING, ZHU JIA-XUAN, ZENG XIANG-XIN, ZHANG BAI-SHEN, JIN LAN <br/><p>The crystal structure and magnetic structure of hard magnetic alloy Mn1.074Al0.871C0.055 have been investigated by neutron diffraction technique. Mn1.074Al0.871C0.055 has body center tetragonal structure. The refinement of neutron diffraction data shows that 0.992 Mn and 0.008 C occupy (0,0,0) site and 0.082 Mn, 0.871 Al and 0.047 C occupy(1/2,1/2,1/2)site. The magnetic moments of manganese atoms in the different sites are alongc-axis pointing in opposite directions. In comparison of these results with that of binary alloy Mn1.09Al0.91, the significant improvement of magnetic and mechanical properties in ternary alloy Mn1.074Al0.871C0.055 can be explained.</p> <br/>Acta Physica Sinica. 1983 32(11): 1455-1459. Published 2005-07-21 Author(s): YANG YING-CHANG, HE WEN-WANG, LIN QIN, YANG JI-LIAN, ZHOU HUI-MING, ZHU JIA-XUAN, ZENG XIANG-XIN, ZHANG BAI-SHEN, JIN LAN <br/><p>The crystal structure and magnetic structure of hard magnetic alloy Mn1.074Al0.871C0.055 have been investigated by neutron diffraction technique. Mn1.074Al0.871C0.055 has body center tetragonal structure. The refinement of neutron diffraction data shows that 0.992 Mn and 0.008 C occupy (0,0,0) site and 0.082 Mn, 0.871 Al and 0.047 C occupy(1/2,1/2,1/2)site. The magnetic moments of manganese atoms in the different sites are alongc-axis pointing in opposite directions. In comparison of these results with that of binary alloy Mn1.09Al0.91, the significant improvement of magnetic and mechanical properties in ternary alloy Mn1.074Al0.871C0.055 can be explained.</p> <br/>Acta Physica Sinica. 1983 32(11): 1455-1459. Published 2005-07-21 NEUTRON DIFFRACTION STUDY OF HARD MAGNETIC ALLOY MnAlC YANG YING-CHANG, HE WEN-WANG, LIN QIN, YANG JI-LIAN, ZHOU HUI-MING, ZHU JIA-XUAN, ZENG XIANG-XIN, ZHANG BAI-SHEN, JIN LAN 2005-07-21 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(11): 1455-1459. article doi:10.7498/aps.32.1455 10.7498/aps.32.1455 Acta Physica Sinica 32 11 2005-07-21 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1455 1455-1459 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1460 Author(s): SUN ZHANG-DE <br/><p>For a semi-infinite crystal,the expression for wave field of X-ray reflection,Dh is de-rived by the retarded Green function G(r). For a crystal with finite thickness it can be solred using G(r) and advanced Green functions Ga as well.These results have been corn.pared with previous results obtained by using Riemann function or Fourier integral andit is found that they are in agreement quite well.</p> <br/>Acta Physica Sinica. 1983 32(11): 1460-1466. Published 2005-07-21 Author(s): SUN ZHANG-DE <br/><p>For a semi-infinite crystal,the expression for wave field of X-ray reflection,Dh is de-rived by the retarded Green function G(r). For a crystal with finite thickness it can be solred using G(r) and advanced Green functions Ga as well.These results have been corn.pared with previous results obtained by using Riemann function or Fourier integral andit is found that they are in agreement quite well.</p> <br/>Acta Physica Sinica. 1983 32(11): 1460-1466. Published 2005-07-21 SOLUTION OF THE EQUATION OF X-RAYS DIFFRACTION BY GREEN FUNCTION IN BRAGG CASE SUN ZHANG-DE 2005-07-21 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(11): 1460-1466. article doi:10.7498/aps.32.1460 10.7498/aps.32.1460 Acta Physica Sinica 32 11 2005-07-21 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1460 1460-1466 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1467 Author(s): MO DANG, PAN SHI-HONG, W. E. SPICER, I. LINDAU <br/><p>New data about photoemission spectra of silver on GaAs (110) cleavage surface have been found by measurement at hv=21.2eV, 40.8eV, and 1486.6eV. Some additional data of gold on GaAs are also obtained. The thickness of evaporated Ag and Au films used for measurement ranged from 0.1? to 1000?.A maximum in the functional relation between the intensity of UPS valence spectra and the thickness of film has been noted and discussed.</p> <br/>Acta Physica Sinica. 1983 32(11): 1467-1470. Published 2005-07-21 Author(s): MO DANG, PAN SHI-HONG, W. E. SPICER, I. LINDAU <br/><p>New data about photoemission spectra of silver on GaAs (110) cleavage surface have been found by measurement at hv=21.2eV, 40.8eV, and 1486.6eV. Some additional data of gold on GaAs are also obtained. The thickness of evaporated Ag and Au films used for measurement ranged from 0.1? to 1000?.A maximum in the functional relation between the intensity of UPS valence spectra and the thickness of film has been noted and discussed.</p> <br/>Acta Physica Sinica. 1983 32(11): 1467-1470. Published 2005-07-21 PHOTOELECTRON SPECTROSCOPY FOR VALENCE BAND OF SILVER AND GOLD FILMS ON GALLIUM ARSENIDE MO DANG, PAN SHI-HONG, W. E. SPICER, I. LINDAU 2005-07-21 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(11): 1467-1470. article doi:10.7498/aps.32.1467 10.7498/aps.32.1467 Acta Physica Sinica 32 11 2005-07-21 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1467 1467-1470 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1471 Author(s): JIA WEI-YI, XIONG JI-WU <br/><p>In solutions of fluorescent materials containing some suspended particles, an enhancement phenomenon has been observed. The effect is supposed to be caused by Rayleigh scattering and Mie structure resonance scattering from the particles.</p> <br/>Acta Physica Sinica. 1983 32(11): 1471-1473. Published 2005-07-21 Author(s): JIA WEI-YI, XIONG JI-WU <br/><p>In solutions of fluorescent materials containing some suspended particles, an enhancement phenomenon has been observed. The effect is supposed to be caused by Rayleigh scattering and Mie structure resonance scattering from the particles.</p> <br/>Acta Physica Sinica. 1983 32(11): 1471-1473. Published 2005-07-21 ENHANCEMENT OF FLUORESCENCE INDUCED BY SCATTERING FROM SUSPENDED PARTICLES JIA WEI-YI, XIONG JI-WU 2005-07-21 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(11): 1471-1473. article doi:10.7498/aps.32.1471 10.7498/aps.32.1471 Acta Physica Sinica 32 11 2005-07-21 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1471 1471-1473 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1474 Author(s): YIN ZHEN, MA HONG-RU, XIE DENG-PING, CAI JIAN-HUA <br/><p>The present note gives the results of computations of the electronic energy spectrum and local density of state of layered ultrathin coherent structures composed of two face-cen-tered-cubic metals under the tight-binding approximation with inclusion of only nearest neighbor interactions.</p> <br/>Acta Physica Sinica. 1983 32(11): 1474-1478. Published 2005-07-21 Author(s): YIN ZHEN, MA HONG-RU, XIE DENG-PING, CAI JIAN-HUA <br/><p>The present note gives the results of computations of the electronic energy spectrum and local density of state of layered ultrathin coherent structures composed of two face-cen-tered-cubic metals under the tight-binding approximation with inclusion of only nearest neighbor interactions.</p> <br/>Acta Physica Sinica. 1983 32(11): 1474-1478. Published 2005-07-21 THE ELECTRONIC STRUCTURE OF f.c.c./f.c.c.LUCS YIN ZHEN, MA HONG-RU, XIE DENG-PING, CAI JIAN-HUA 2005-07-21 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(11): 1474-1478. article doi:10.7498/aps.32.1474 10.7498/aps.32.1474 Acta Physica Sinica 32 11 2005-07-21 //www.getgobooth.com/en/article/doi/10.7498/aps.32.1474 1474-1478

map