Work

Vortex Pinning due to Dynamic Spin–Vortex Interaction in a Superconductor/Ferromagnet Multilayer

Year: 2009

Type: article

Abstract: We investigate the mutual interaction between superconductivity and ferromagnetism in a Nb/Ni 81 Fe 19 multilayer by ac susceptibility measurements. Compared with a pure superconducting Nb film, the critical current density of the multilayer is apparently enhanced in a low magnetic field region but remains nearly the same in high magnetic fields, which indicates that a continuous ferromagnetic layer with in-plane magnetization can produce strong vortex pinning in a low field region. We interpret this unusual vortex-pinning phenomenon as a consequence of dynamic spin–vortex interaction which induces a spin rotation following vortex movement. In addition, we propose that this dynamic interaction could be used for spin manipulation via a superconductor.

Source: Chinese Physics Letters

DOI: 10.1088/0256-307x/26/1/017502

Authors: Wu Hong-Ye, Zou Tao, Cheng Zhao-Hua, Sun Young

Institutions: Chinese Academy of Sciences, Institute of Physics, State Key Laboratory of Magnetism

Language: English

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funder: National Natural Science Foundation of China

Award: 铁磁/超导异质结构的自旋动力学与邻近效应的研究