FePt-MgO垂直磁记录介质的磁性和记录特性之间的关系  

Correlation between Magnetic Properties and Recording Performance of FePt-MgO Perpendicular Magnetic Recording Media

作　　者：阴津华[1] 侯志坚[1] 潘礼庆[1] 张振刚 铃木孝雄 

机构地区：[1]北京科技大学物理系 [2]丰田工业大学,日本名古屋468-8511

出　　处：《材料导报》2008年第8期114-115,共2页Materials Reports

基　　金：日本存储研究协会;日本教育文化体育科技部科学研究的专项资助.

摘　　要：利用溅射和退火工艺制备了不同组分和厚度的FePt-MgO垂直磁记录介质,并用极化克尔效应测量了介质的磁滞回线,用Spinstand测量了记录性能。研究结果表明,垂直记录介质中磁性晶粒间交换耦合的α值与退火前单层FePt的厚度成反比;信噪比与α值成反比;高频噪音与α值成正比。FePt/MgO granular perpendicular magnetic media with different structures are fabricated by sputtering and post-annealing. Magneto-optical Kerr effect （MOKE） is used to measure the magnetic hysteresis loop. Signal noise ratio （SNR） is decreased with the increase of the exchange coupling. Usually a is used to characterize the exchange coupling between the grains in perpendicular media, α （M-H loop slope parameter,α= 4n（dM/dH） at H=Hc） is decreased with the increase of the thickness of FePt layer. Spin-stand is used to investigate the recording performance of the disks. Noise at high frequency is increased with the increase of the exchange coupling.

关 键 词：磁性 记录特性 垂直磁记录介质 

分 类 号：TQ587[化学工程—精细化工] TN304.055[电子电信—物理电子学]