Time- and vector-resolved Kerr microscopy of hard disk writers

Time- and vector-resolved Kerr microscopy of hard disk writers
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硬盘写入器的时间和矢量分辨克尔显微镜

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发表时间：
2011
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通讯作者：
R. Lopusník
R. Lopusník
中科院分区：
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文献类型：
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作者：
P. Gangmei;P. Keatley;W. Yu;R. Hicken;M. Gubbins;P. Czoschke;R. Lopusník

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时间分辨扫描克尔显微镜已被用来进行晶圆级测量内的磁轭和磁极片的部分建成的硬盘写入器结构的磁化动力学。三个笛卡尔分量的矢量磁化被同时记录使用象限光电二极管偏振桥检测器。每个分量的上升时间、弛豫时间和幅度与磁基态、初始转矩以及通过磁轭和极片的磁通传播有关。动态图像显示“磁通束”，其中平行于磁轭对称轴的磁化分量沿该轴沿着最大。
Time-resolved scanning Kerr microscopy has been used to make wafer level measurements of magnetization dynamics within the yoke and pole piece of partially built hard disk writer structures. Three Cartesian components of the vector magnetization were recorded simultaneously using a quadrant photodiode polarization bridge detector. The rise time, relaxation time, and amplitude of each component has been related to the magnetic ground state, the initial torque, and flux propagation through the yoke and pole piece. Dynamic images reveal “flux-beaming” in which the magnetization component parallel to the symmetry axis of the yoke is largest along that axis.