Magnetic interaction among particles in Co–Cr–Ta media and Co/Pt multilayered media evaluated by anomalous Hall effect
Magnetic interaction among particles in Co–Cr–Ta media and Co/Pt multilayered media evaluated by anomalous Hall effect
复制标题
通过反常霍尔效应评估 Co-Cr-Ta 介质和 Co/Pt 多层介质中颗粒之间的磁相互作用
DOI：
10.1063/1.1451744
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发表时间：
2002
影响因子：
3.2
通讯作者：
S. Nakagawa
中科院分区：
文献类型：
--
作者：
Sarbanoo Das;S. Nakagawa
本文提出了一种利用反常霍尔效应（AHE）和振动样品磁强计（VSM）测量倾斜磁场下垂直磁记录层中颗粒间磁相互作用的新方法。测量初始曲线和磁滞回线以确定ΔM，Δ M是使用ΔM=Minit−0.5×（Mup+Mdown）关系来估计相互作用的评价指标。通过结合VSM和AHE测量获得的结果，可以将相互作用程度ΔM确定为矢量。ΔM的顶点分布（DOV）可以看作是在特定方向上的相互作用程度。Co-Cr-Ta薄膜中ΔM的DOV沿面内方向沿着延伸，并随着外加电场方向向膜面倾斜而逐渐收敛。这可以是Co-Cr-Ta薄膜中的磁性颗粒倾向于单独地向所施加的场方向倾斜的指示。另一方面，Co/Pt多层薄膜中ΔM的DOV值随温度的升高而增大。
A new method for evaluating magnetic interaction among the particles in perpendicular magnetic recording layers under canted magnetic field has been proposed using anomalous Hall effect (AHE) measurement and vibrating sample magnetometer (VSM) measurement. Initial curves and magnetic hysteresis loops were measured to determine ΔM, an evaluation index to estimate interaction using the relation as ΔM=Minit−0.5×(Mup+Mdown). The degree of interaction ΔM can be determined as a vector by combining the results obtained by VSM and AHE measurements. Distribution of vertices (DOV) of ΔM can be regarded as a degree of interaction in a particular direction. The DOV of ΔM in Co–Cr–Ta thin film extended along the in-plane direction and showed gradual convergence as the applied field direction canted toward the film plane. This can be an indication that the magnetic particles in the Co–Cr–Ta thin film tend to incline to the applied field direction individually. On the other hand, the DOV of ΔM in Co/Pt multilayered thin...