【摘要】 采用直流磁控溅射的方法在氧化镁(100)单晶基板上生长了一系列c轴垂直取向的FePt薄膜,通过改变沉积时的基板温度,薄膜从Fe,Pt原子无序排列的面心立方结构逐渐变化到有序排列的L10相面心四方结构.在此基础上,系统研究了FePt薄膜的化学有序度对磁和磁光性能的影响.随着有序度的增加,FePt薄膜的磁晶各向异性能,以及沿垂直方向的矫顽力、剩磁比均增加,在基板温度高于530℃时制备的薄膜中的磁晶各向异性能超过1J/cm3.同时,还观察到有序FePt合金薄膜的磁光克尔光谱(克尔转角的大小和极值所对应的跃迁光子能量)随化学有序度的显著变化.更多还原

【Abstract】 A series of FePt thin films with perpendicular c-axis orientation were deposited on single crystal MgO（001）substrates by DC magnetron sputtering.With the increase of substrate temperature during deposition,FCC disordered structure transforms to FCT ordered structure（L1₀ phase）gradually,and the chemical ordering parameter increases simultaneously.Furthermore,the magneto-crystalline anisotropy,coercivity and squareness ratio of the hysteresis loops along perpendicular direction increase also.The magneto-optical Kerr spectra were found to be changing notablely with the chemical ordering of FePt films.更多还原