计算物理 ›› 2004, Vol. 21 ›› Issue (1): 49-53.

• 研究论文 • 上一篇    下一篇

磁性薄膜自旋重取向行为的Monte Carlo模拟

肖艳1, 冯倩1, 陈志高1,2, 李永森1, 曾民勇1, 黄志高1,2   

  1. 1. 福建师范大学物理系, 福建 福州 350007;
    2. 南京大学固体微结构国家重点实验室, 江苏 南京 210093
  • 收稿日期:2002-11-06 修回日期:2003-04-27 出版日期:2004-01-25 发布日期:2004-01-25
  • 作者简介:肖艳(1975-),女,四川内江,讲师,硕士,从事有关凝聚各物理方面的研究.
  • 基金资助:
    福建省教育厅资助项目(JB02153)

Monte Carlo Simulation of Spin Reorientation in Magnetic Thin Film

XIAO Yan1, FENG Qian1, CHEN Zhi-gao1,2, LI Yong-sen1, ZENG Min-yong1, HUANG Zhi-gao1,2   

  1. 1. Department of Physics, Fujian Normal University, Fuzhou 350007, China;
    2. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
  • Received:2002-11-06 Revised:2003-04-27 Online:2004-01-25 Published:2004-01-25

摘要: 利用Monte Carlo方法模拟了二维简单立方结构磁性薄膜的自旋重取向行为,重点研究了各向异性和偶极相互作用对系统自旋取向的影响.通过计算,获得了系统的相图以及系统组态、磁分量、比热等随偶极相互作用和温度的变化规律.模拟结果表明,在-定的参数范围内,随着温度的升高,系统的自旋取向将由垂直向平行方向转变.

关键词: 磁性薄膜, Monte Carlo方法, 偶极相互作用, 磁相变

Abstract: The spin reorientation of magnetic thin film on a simple cubic lattice is simulated by employing Monte Carlo method.The influence of the magnetic anisotropy and the long-range dipolar interaction on the spin configurations of the system is also studied in detail.Meanwhile,the phase diagrams and the distributions of spin configuration,magnetization,specific heat of the systems are obtained.The results show that in a range of parameters,a transition from out-of-plane to in-plane ordering with the increase of the temperature is possible.

Key words: magnetic thin film, Monte Carlo simulation, dipole-dipole interaction, phase transition

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