Exchange coupled composite media for perpendicular magnetic recording
Exchange coupled composite media for perpendicular magnetic recording
复制标题
DOI：
10.1109/tmag.2005.855278
复制
发表时间：
2005-10-01
影响因子：
2.1
通讯作者：
Bai, JM
中科院分区：
文献类型：
--
作者：
Wang, JP;Shen, WK;Bai, JM
这项工作对一种新型交换耦合复合（ECC）介质进行了系统的论证和研究。事实证明，写入能力和热稳定性是基于这种新介质分别设计的。 [Co-PdSiO]、硬层和 FeSiO 软层之间通过 PdSi 夹层实现适当的交换耦合。透射电子显微镜平面图和横截面视图观察、宏观磁性和微观磁性测试证明了 ECC 介质具有软区和硬区的垂直生长磁性颗粒。磁性颗粒的软区域与外场的切换使磁性颗粒的硬区域的磁化强度与垂直方向旋转约45度，这导致与动态倾斜介质类似的行为。我们发现 ECC 介质的剩余矫顽力角色散要低得多，这是此类介质的另一个优点。与垂直介质相比，ECC 介质表现出更好的记录性能。磁性颗粒的硬区和软区（交换弹簧介质）之间的强交换耦合也基于上述提出的层结构进行了讨论。
A novel exchange coupled composite (ECC) media was demonstrated and investigated systematically in this work. The writing capability and thermal stability were proved to be engineered separately based on this new media. Proper exchange coupling between [Co-PdSiO], hard layer and FeSiO soft layer was implemented through a PdSi interlayer. Transmission electron microscope plan-view and cross section view observations, macromagnetic, and micromagnetic testing proved vertically grown magnetic grains with soft and hard regions for ECC media. The switching of the soft region of magnetic grains with the external field rotated the magnetization of the hard region of magnetic grains to about 45 degrees with perpendicular direction, which resulted in a similar behavior as a dynamic tilted media. A much lower angle dispersion of the remanent coercivity for the ECC media was found, which is another advantage for such media. ECC media showed better recording performance compared to perpendicular media. Strong exchange coupling between the hard and soft regions of magnetic grains (exchange spring media) was discussed based on the above proposed layer structure too.