Moke and fmr studies were performed on single crystalline fe ultathin films epitaxially grown on iii - v semiconductor gaas substrate with thickness 4 . 1 - 33 monolayer ( ml ) . a theoretical mode for fitting fmr experimental data was established . the results demonstrated the structures and reproduced the evolution of the magnetic properties of ultrathin films with various thickness from the state of superparamagnetic nano - cluster through coexistence of two magnetic phases to continuous film , especially the change of magnetic crystalline anisotropy from unixial to cubic 1 - 33原子层厚度( monolayer ,简称ml )的fe单晶超薄膜进行了铁磁共振( fmr )和磁光研究，建立了理论模型对铁磁共振实验结果进行了模拟，重现了不同厚度的超薄膜，从纳米团簇到两相共存的过度阶段直至连续薄膜结构与磁性的变化，特别是磁各向异性从单轴各向异性向立方各向异性转变的演化过程。
In the last twenty years , extensive studies have been made on the structure , basic magnetic properties , interlayer coupling , interfacial structures and its relative effects in magnetic thin and ultrathin films due to their potential application in magnetic random access memory ( mram ) and ultrahigh - density data storage 随着在磁性随机存储器和超高密度存储技术中应用的不断拓展，近二十年来，磁性薄膜和超薄膜的结构、基本磁性、层间耦合、界面状况及其相关效应一直是人们研究的熟点和难点之一。
