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A magnetic force microscopy study of the magnetic reversal of a single Fe nanowire

机译:单个Fe纳米线的磁性反转的磁力显微镜研究

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The magnetization reversal properties of a single 60 nm diameter Fe nanowire were investigated with an in-field magnetic force microscope (MFM). MFM images were observed in a successively decreasing applied field, at various angles between the applied field and the nanowire axis. The results show that the magnetization undergoes a sharp reversal at various angles. When the applied field deviates from the nanowire axis, before complete magnetization reversal, a coherent rotation of magnetic moments inside the nanowire and a stable vortex state at the end of the nanowire are exhibited. The angle dependence of the switching field can be closely described by a curling model, despite the fact the magnetization reversal process is not identical to this model.
机译:用场内磁力显微镜(MFM)研究了直径为60 nm的单根Fe纳米线的磁化反转特性。在连续减小的施加场中,在施加场和纳米线轴之间的各种角度下观察到MFM图像。结果表明,磁化在各种角度下都经历了急剧的反转。当施加的磁场偏离纳米线轴时,在完全磁化反转之前,纳米线内部的磁矩会发生连贯旋转,并在纳米线末端显示出稳定的涡旋状态。尽管磁化反转过程与此模型不同,但可以通过卷曲模型来精确描述开关场的角度依赖性。

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