金属学报  1985, Vol. 21 Issue (4): 81-88

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用Monte-Carlo方法研究自旋玻璃体系

许淑艳;郑德娟;于鲲

中国科学院原子能研究所;中国科学院物理研究所;中国科学院物理研究所

MONTE-CARLO SIMULATION OF SPIN GLASS SYSTEMS

XU Shuyan Institute of Atomic Energy;Academia Sinica;Beijing;ZHENG Dejuan;YU Kun Institute of Physics;Academia Sinica;Beijing

许淑艳;郑德娟;于鲲. 用Monte-Carlo方法研究自旋玻璃体系[J]. 金属学报, 1985, 21(4): 81-88.
, , . MONTE-CARLO SIMULATION OF SPIN GLASS SYSTEMS[J]. Acta Metall Sin, 1985, 21(4): 81-88.

摘要 参考文献 相关文章 Metrics 全文: PDF(579 KB)   摘要: 本文使用Monte-Carlo方法,采用Metropolis抽样,研究自旋玻璃体系的平衡态特性.计算了具有六角密堆积点阵的非磁性母金属,格点数N=9×9×9×2,磁性杂质浓度x=0.5,1,2,3,5,8,10,15%的自旋玻璃体系的比热和磁化率随温度的变化.自旋系统采用Heisenberg模型,Nx个磁性原子随机均匀地分布在格点上,自旋之间只考虑RKKY长程交换作用,作用长度R_0=3α.计算采用纠偏方法,一次计算一组温度点,节省了计算量.计算得到的磁化率和比热曲线与实验符合较好. Abstract：The properties of the spin glass systems in equilibrium state were studied bymeans of Monte-Carlo simulation and Metropolis sampling.The temperature depen-dence of the susceptibility and specific heat was computed for the spin glass sys-tems where the host of hcp lattice is non-magnetic,the number of lattice pointsN=9×9×9×2,and the concentration of magnetic impurity x=0.5,1,2,3,5,8,10 and 15 at.-%.Using Heisenberg model,it was assumed that NX magneticatoms are located at the lattice points randomly and homogeneously.It was alsoassumed that the only interaction between spins is the RKKY long-range oscillatoryexchange with an interaction length R_0=3a.The deviated method was used incalculation for a group of temperature each time in order to Save time.The calcu-lated curves of susceptibility and specific heat are consistent with the correspond-ing experiments fairly well. 收稿日期: 1985-04-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 许淑艳 郑德娟 于鲲 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1985/V21/I4/81 1 Edwards,S.F.;Anderson,P.W.,J.Phys.F,5(1975) ,965． 2 Sherrington,D.;Kirkpatrick,S.,Phys Rev.Lett.,35(1975) ,1792． 3 Stauffer,D.;Binder,K.,Z.Phys.,B,30(1978) ,313． 4 Gash,P.;Roshko,R.;Symko,O.G.,Phys.Rev.,B,25(1982) ,5987． 5 Metropolis,N.;Rosenbluth,A.W.;Rosenbluth,M.N.;Teller,A.H.;Teller,E.,J.Chem.Phys.,21(1953) ,1087． 6 Ford,P.J.,Contemp.Phys.,23(1982) ,141． 7 Cannella,V.;Mydosh,J.A.,J.Appl.Phys.,42(1971) ,1689．y No related articles found! Viewed Full text Abstract Cited   Shared      Discussed