非均匀磁场对超导体/铁磁体双层结构中涡-反涡链动力学行为的影响

IF 0.5 4区物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY

Acta Physica Polonica A Pub Date : 2023-07-01 DOI:10.12693/aphyspola.144.7

Y. Zhong, S. Du, S. Yao, L. Peng, J. Chen, L. Sang, J. Lin, X. Liu

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引用次数: 0

摘要

采用有限元法数值求解随时间变化的金兹堡-朗道方程，研究了非均匀磁场对超导体/铁磁体双层结构中涡旋-反涡旋链动力学行为的影响。结果表明，超导体/铁磁结构的耦合效应表现为涡旋-反涡旋对相互作用。耦合效应随着磁场不均匀程度的增加而增加。涡旋-反涡旋链的周期性运动导致了超导薄膜中磁化强度和超导电流的周期性振荡。振荡频率由非均匀磁场和外部驱动电流调节。

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Influence of Inhomogeneous Magnetic Field on Dynamic Behavior of Vortex-Antivortex Chains in the Superconductor/Ferromagnet Bilayer Structures

Using a ﬁnite element method to numerically solve the time-dependent Ginzburg–Landau equations, we studied the inﬂuence of an inhomogeneous magnetic ﬁeld on the dynamic behavior of vortex–antivortex chains in the superconductor/ferromagnet bilayer structures. Our results show that the coupling eﬀect of superconductor/ferromagnet structures manifests as the vortex–antivortex pairs interaction. The coupling eﬀect increases with the increasing level of inhomogeneity of the magnetic ﬁeld. The periodic motion of the vortex–antivortex chains leads to the periodic oscillations of the magnetization and superconducting current in the superconductor ﬁlm. The frequency of oscillations is adjusted by the inhomogeneous magnetic ﬁeld and the external driving current.

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来源期刊

Acta Physica Polonica A 物理-物理：综合

CiteScore

1.50

自引率

0.00%

发文量

141

审稿时长

6 months

期刊介绍： Contributions which report original research results and reviews in the fields of General Physics, Atomic and Molecular Physics, Optics and Quantum Optics, Quantum Information, Biophysics, Condensed Matter, and Applied Physics are welcomed.