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Switchable magnetic dipole induced guided vortex motion

机译:可切换磁偶极子诱导的涡旋运动

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摘要

We present evidence of magnetically controlled vortex motion in an Al film on top of a periodic array of Permalloy square rings. The resulting magnetic template generates a strongly anisotropic pinning potential landscape for vortices in the superconducting layer. Transport measurements show that this anisotropy is able to confine the flux motion along the high symmetry axes of the square lattice of dipoles. This guided vortex motion can be rerouted by 90° simply changing the dipole orientation or even suppressed by inducing a flux-closure magnetic state with very low stray fields in the rings.
机译:我们提出了在坡莫合金方形环周期阵列顶部的铝膜中磁控涡旋运动的证据。所得的磁性模板为超导层中的涡旋产生强烈各向异性的钉扎势态。输运测量表明,这种各向异性能够限制磁通沿着偶极子方阵的高对称轴运动。只需改变偶极子的方向,就可以将这种引导的涡旋运动重新定向90°,甚至可以通过在环中产生具有非常低杂散磁场的磁通量闭合磁状态来抑制它。

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