【摘要】 应用MonteCarlo模拟的方法 ,研究了交换相互作用、表面各向异性和长程偶极相互作用共同作用下超薄磁膜磁化状态随温度的演化。通过计算系统的相图 ,分析了交换相互作用、表面各向异性和长程偶极相互作用对系统状态的影响 ,从理论上再现了系统从垂直磁化向面内磁化转变时的宏观磁矩的丢失现象 ,得到了与实验观测相一致的结果 ,并由此阐明了该过程的物理机制。更多还原

【Abstract】 By using Monte Carlo simulations,the evolvement of the magnetic states developing with temperature is studied with the surface anisotropy,long ranged dipole interaction and short ranged exchange interaction.Through the calculation of phase diagram,the influences of the surface anisotropy,long ranged dipole interaction and short ranged exchange interaction on the system are theoretically analyzed.The loss of the magnetization is reproduced when the system changes from an out of plane to an in plane ordered state.The results are consistent with the experiments.The mechanism of this process is analyzed.更多还原