| 磁性多层膜磁特性的蒙特卡罗模拟 |
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| 引用本文： | 冯倩,叶晴莹,肖艳,赖恒,曾民勇,黄志高. 磁性多层膜磁特性的蒙特卡罗模拟[J]. 福建师范大学学报(自然科学版), 2002, 18(4): 35-39 |
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| 作者姓名： | 冯倩 叶晴莹 肖艳 赖恒 曾民勇 黄志高 |
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| 作者单位： | 1. 福建师范大学物理系,福建,福州,350007
2. 福建师范大学物理系,福建,福州,350007;南京大学固体微结构国家重点实验室,江苏,南京,210093 |
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| 基金项目： | 福建省自然科学基金资助项目 (E0 0 10 0 2 2 )，教育部中青年骨干教师项目 (BD0 41)，福建省科技厅资助项目(2 0 0 0 Z14 6) |
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| 摘 要： | 利用Monte Carlo模拟方法研究了样品的尺寸、交换耦合相互作用、各向异性对磁性多层膜的磁特性的影响。重点研究磁性多层膜的维度特性及其相变，当磁性层厚度减小时，系统从三维转变为二维，居里温度减小，M（T）呈线性的维度效应。Bloch系数B与磁相互作用J及平均配位数Z有很大的关系，B正比于^-Z^-3/2及J^-3/2。模拟结果与用自旋波激发理论和平均场理论计算的结果相吻合，且较好地解释了实验事实。
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| 关 键 词： | 磁特性 蒙特卡罗模拟 磁性多层膜 Monte Carlo方法 维度特性 磁相变 自旋波激发 |
| 文章编号： | 1000-5277(2002)04-0035-05 |
| 修稿时间： | 2002-08-15 |
Monte Carlo Simulation of Magetic Properties of Multilayered Film |
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| FENG Qian ,YE Qing ying ,XIAO Yan ,LAI Heng ,ZENG Min yong ,HUANG Zhi gao . Monte Carlo Simulation of Magetic Properties of Multilayered Film[J]. Journal of Fujian Teachers University(Natural Science), 2002, 18(4): 35-39 |
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| Authors: | FENG Qian YE Qing ying XIAO Yan LAI Heng ZENG Min yong HUANG Zhi gao |
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| Affiliation: | FENG Qian 1,YE Qing ying 1,XIAO Yan 1,LAI Heng 1,ZENG Min yong 1,HUANG Zhi gao 1,2 |
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| Abstract: | Based on the Monte Carlo simulation method, Magnetic properties of multilayered film with different thickness, interaction, and magnetic anisotropy are studied . It is found that the phase transition temperature decreased and M(T)-T relations became linearized with the decreasing or the thickness. The Bloch constant B varies with different interaction ( J) and different nearest numbers of an atom( ). B is proportional to and J -3/2 ,the simulation results are compared directly with the results based on the spin-wave excitations and mean field theory , and are consistent with experimental facts. |
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| Keywords: | magnetic multilayer Monte Carlo simulation dimentional effect magnetic phase spin wave excitation |
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