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.
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.
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| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] | |
| [9] | |
| [10] | |
| [11] |
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