磁场热处理对FePt薄膜结构和磁性的影响  

Effect of magnetic annealing on structure and magnetic properties of FePt films

作　　者：张玉梅[1] 刘梅[1] 华杰[1] 王丽[1] 李海波[1] 

机构地区：[1]吉林师范大学功能材料物理与化学教育部重点实验室,吉林四平136000

出　　处：《兵器材料科学与工程》2015年第5期9-12,共4页Ordnance Material Science and Engineering

基　　金：国家自然基金项目(20971055);吉林省科技发展计划项目(201205075)

摘　　要：采用磁控溅射方法在表面氧化的Si(100)基片上制备了厚为70nm的FePt薄膜,在不同温度下于磁场中进行热处理,利用X线衍射仪、振动样品磁强计和原子力显微镜对样品进行分析,研究磁场热处理对FePt薄膜结构和磁性的影响。结果表明:磁场热处理有助于FePt薄膜的无序-有序相转变,在0.4MA/m磁场中,经过500℃热处理的FePt薄膜的有序化程度提高,平行和垂直膜面的矫顽力增大;磁场热处理能够抑制磁性颗粒的团聚,使薄膜中的磁性颗粒分布均匀,薄膜表面的粗糙度降低。The FePt films with the thickness of 70 nm were prepared by co-sputtering and annealed at various temperatures under magnetic field. The effect of magnetic field annealing on structure and magnetic properties of the films was investigated by X-ray diffraction, vibrating sample magnetometer and atomic force microscopy. The results indicate that magnetic field annealing can promote disorder-order transformation of the FePt films. The ordering parameter, in-plane and out-of-plane coercivities of the filmannealed at 500 ℃ with 0.4 MA/m magnetic field increase. AFM images show that films are granular structures with smooth surface and low roughness. Magnetic field annealing can restrain particles aggregation.

关 键 词：L10 FePt薄膜 磁场热处理 结构 磁性 

分 类 号：O482.5[理学—固体物理]