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arXiv 1904.04537cond-mat.mtrl-scicond-mat.mes-hall
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铁磁-超导异质结构中超导涡旋对磁Skyrmions的操纵

Manipulation of Magnetic Skyrmions by Superconducting Vortices in Ferromagnet-Superconductor Heterostructures

Raí M. Menezes, José F. S. Neto, Clécio C. de Souza Silva, Milorad V. Milošević

摘要:

混合铁磁薄膜中的磁skyrmions动力学具有新颖的物理现象,并具有良好的技术应用前景。在这项工作中,我们讨论的行为时,磁skyrmions耦合到超导涡旋的铁磁超导异质结构。我们使用数值模拟和分析参数来揭示更广泛的可能性操纵的混合系统中的skyrmion涡动态相关性,这是不可能的,在其单独的成分。我们探索特定的动态相的阈值,并量化的相图作为相关的材料参数,施加的电流和感应转矩的函数。最后,我们证明了广泛和精确的可调性的斯基尔米恩霍尔角的存在下的涡流,相对于电流施加到任一或两个超导体和铁磁体内的异质结构。

英文摘要:

Dynamics of magnetic skyrmions in hybrid ferromagnetic films harbors novel physical phenomena and holds promise for technological applications. In this work, we discuss the behavior of magnetic skyrmions when coupled to superconducting vortices in a ferromagnet-superconductor heterostructure. We use numerical simulations and analytic arguments to reveal broader possibilities for manipulating the skyrmion-vortex dynamic correlations in the hybrid system, that are not possible in its separated constituents. We explore the thresholds of particular dynamic phases, and quantify the phase diagram as a function of the relevant material parameters, applied current and induced magnetic torques. Finally, we demonstrate the broad and precise tunability of the skyrmion Hall-angle in presence of vortices, with respect to currents applied to either or both the superconductor and the ferromagnet within the heterostructure.

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