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

作     者：吴鸿业 邹涛 成昭华 孙阳 

作者机构：State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2009年第26卷第1期

页      面：310-313页

核心收录：

学科分类：080705[工学-制冷及低温工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：Supported by the National Natural Science Foundation of China under Grant No 10674170  and the National Basic Research Programme in China under Grant No 2007CB925003 

主　　题：SUPERCONDUCTORS FERROMAGNETISM MULTILAYERED thin films SUPERCONDUCTIVITY MAGNETIC fields MAGNETIZATION 

摘      要：We investigate the mutual interaction between superconductivity and ferromagnetism in a Nb/Ni81 Ee19 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.