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Extra twist in magnetic bubbles

机译:磁泡额外扭曲

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摘要

In the hard disk of a computer, the memory is stored in the local direction of the magnetization of a magnetic alloy. Here, just two directions of the magnetization (e.g., parallel and antiparallel to the disk) are used. Magnets can, however, form much more complex structures. Examples are bubble domains (1), where in thin magnetic layers, a regular arrangement of magnetic bubbles is induced by small magnetic fields. In PNAS, the work by Yu et al. (2) uses EM to reveal the local orientation of the magnetization in magnetic bubbles and stripes. The magnetization shows surprising twists; instead of rotating always in one direction, it twists back and forth. Such twist may be important for the manipulation of magnetism by electric currents and electric fields.
机译:在计算机的硬盘中,存储器被存储在磁性合金的磁化的局部方向上。这里,仅使用了两个磁化方向(例如,平行于磁盘和反平行于磁盘)。但是,磁铁可以形成更为复杂的结构。气泡域(1)就是示例,其中在薄的磁性层中,磁场的规则排列是由小磁场引起的。在PNAS中,Yu等人的工作。 (2)使用EM揭示了磁泡和条纹中磁化的局部方向。磁化强度显示出令人惊讶的扭曲。而不是总是沿一个方向旋转,而是来回扭曲。这种扭曲对于通过电流和电场操纵磁性可能是重要的。

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