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首页> 外文期刊>Japanese Journal of Applied Physics. Part 1, Regular Papers, Brief Communications & Review Papers >Small Domain Structures in Magnetization Reversal Process of Write Head in Hard Disk Drives Observed by Strain Imaging
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Small Domain Structures in Magnetization Reversal Process of Write Head in Hard Disk Drives Observed by Strain Imaging

机译：应变成像观察的硬盘驱动器写头磁化反转过程中的小畴结构

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摘要

Detection and imaging of magnetic-field-induced strains using scanning probe microscopy enable us to observe magnetic domain structures. Using strain imaging, domain structures in a magnetization reversal process of a thin film write head in a hard disk drive were investigated by scanning the air-bearing surface of the head. An external magnetic field was applied by the head coil. In the process, a characteristic small domain structure appeared in several portions in the bottom pole of the write head. The domain structure was hemispherical with a diameter of around 0.6 μm, consisting of two opposite magnetizations in the direction of the applied magnetic field. The domain structures appeared under a head coil current of less than 10 mA but vanished at larger currents. The portions where the domain structures were created should impede smooth magnetization reversal.
机译：使用扫描探针显微镜对磁场诱发的应变进行检测和成像，使我们能够观察磁畴结构。使用应变成像，通过扫描磁头的空气轴承表面，研究了硬盘驱动器中的薄膜写磁头的磁化反转过程中的畴结构。头部线圈施加了外部磁场。在此过程中，特征性的小域结构出现在写头底极的几个部分中。磁畴结构是半球形的，直径约为0.6μm，由在施加磁场方向上的两个相反的磁化强度组成。磁畴结构出现在小于10 mA的磁头线圈电流下，但在较大电流下消失。产生畴结构的部分应阻止平滑的磁化反转。

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