Planar, micron-=scale ellipses patterned from 700 A/thick Co films exhibit nearly-complete suppression of hydsteresis when magnetized in-plane along their short axes. Using a combination of Magnetic Force Microscopy and Vibrating Sample Magnetometry, we find that the suppression f hysteresis is associated with the continuous deformation of a dipople field configuration. The presnece of hysteresis for in-plane, long-axis magnetization is associated with transitions between topologically inequivalent configurations.
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机译：由700 A /厚的Co膜构成的平面微米级椭圆形，当沿其短轴在平面内磁化时，表现出几乎完全的磁滞抑制。通过结合使用磁力显微镜和振动样品磁强计，我们发现抑制f磁滞与双极场配置的连续变形有关。平面内长轴磁化的磁滞现象与拓扑不等式之间的过渡有关。
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