Time resolved scanning Kerr microscopy of hard disk writer structures with a multilayered yoke
Time resolved scanning Kerr microscopy of hard disk writer structures with a multilayered yoke
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具有多层磁轭的硬盘写入器结构的时间分辨扫描克尔显微镜
DOI：
10.1063/1.4802977
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发表时间：
2013
影响因子：
4
通讯作者：
R. Lopusník
中科院分区：
文献类型：
--
作者：
W. Yu;P. Gangmei;P. Keatley;R. Hicken;M. Gubbins;P. Czoschke;R. Lopusník
用时间分辨和矢量分辨扫描克尔显微镜研究了部分构建的硬盘写入器结构，该结构具有由4个重复的NiFe（约1 nm）/CoFe（50 nm）双层形成的多层磁轭。面内磁化的动态图像表明一个潜在的封闭域平衡状态。这种状态被发现被修改的应用程序的偏置磁场，也在脉冲循环，导致不同的磁化旋转和弛豫行为内的尖端区域。
Partially built hard disk writer structures with a multilayered yoke formed from 4 repeats of a NiFe(∼1 nm)/CoFe(50 nm) bilayer were studied by time and vector resolved scanning Kerr microscopy. Dynamic images of the in-plane magnetization suggest an underlying closure domain equilibrium state. This state is found to be modified by application of a bias magnetic field and also during pulse cycling, leading to different magnetization rotation and relaxation behavior within the tip region.