FePtAg颗粒薄膜的制备及性能表征  

Formation and magnetic properties of nanoparticle FePt∶Ag films

作　　者：展晓元[1] 张跃[1] 顾有松[1] 齐俊杰[1] 郑小兰[1] 

机构地区：[1]北京科技大学材料物理与化学系,北京100083

出　　处：《功能材料》2006年第9期1436-1437,1441,共3页Journal of Functional Materials

基　　金：国家杰出青年基金资助项目(50325209);国家自然科学基金重点资助项目(50232030)

摘　　要：采用磁控溅射方法在自然氧化的单晶Si(100)基片上制备了FePtAg颗粒薄膜。通过调整靶材的溅射速率、控制掺杂Ag元素的含量,选择适当的热处理工艺,获得了晶粒尺寸约5nm,分布均匀的FePt颗粒薄膜,矫顽力为3.2×105A/m,磁滞回线具有良好的矩形度,薄膜内部无交换耦合作用,适用于高密度磁记录介质材料。FePtAg films have been deposited on natural-oxidized Si（100） substrates by magnetron sputtering. Through controlling the targets＇ deposition velocity, annealing process and the Ag weight ratio, we have fabricated the FePtAg nanoparticle thin films, the grain size of FePtAg films annealed at 300℃ is 5nm and uniform, the magnetic hysteresis loops has good magnetic squareness, and the coercivity is 3.2×10^5 A/m. The adjustable coercivity and fine grain size suggest that this nanocomposites system have significant potential as recording media at extremely high areal density.

关 键 词：FePt薄膜 交换耦合 磁性能 热处理 

分 类 号：TM274[一般工业技术—材料科学与工程]