Composite media (dynamic tilted media) for magnetic recording
Composite media (dynamic tilted media) for magnetic recording
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DOI：
10.1063/1.1896431
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发表时间：
2005-04
影响因子：
4
通讯作者：
Jianping Wang;W. Shen;J. Bai;R. Victora;J. Judy;W. Song
中科院分区：
文献类型：
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作者：
Jianping Wang;W. Shen;J. Bai;R. Victora;J. Judy;W. Song
设计并制作了一种由两个垂直交换耦合磁区（一个磁软区和一个磁硬区）组成的交换去耦磁颗粒复合磁记录介质，以减轻垂直磁记录磁头的写入场限制。在硬层和软层之间放置不同厚度的非磁性层来调节交换耦合。在适当耦合的情况下，复合介质的矫顽力场明显下降，但仍保持良好的热稳定性。与垂直介质和纵向介质相比，该介质具有更好的记录性能。结果证明了制备具有超高磁各向异性常数（Ku）值的可写记录介质的可能性。
We designed and fabricated a composite magnetic recording medium with exchange decoupled magnetic grains that consist of two vertically exchange-coupled magnetic regions (one is magnetically soft and one is magnetically hard) as an approach to alleviate the writing field limitation of perpendicular magnetic recording heads. A nonmagnetic layer with different thickness was put between the hard and soft layer to tune the exchange coupling. With proper coupling, significant drop of the coercivity field was observed for this composite medium while still maintaining good thermal stability. Better recording performance was obtained for such medium compared to perpendicular and longitudinal medium. The results have proved the possibility of fabricating a writable recording medium having an ultrahigh magnetic anisotropy constant (Ku) value.