Chin. Phys. Lett.  2009, Vol. 26 Issue (1): 017502    DOI: 10.1088/0256-307X/26/1/017502
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Vortex Pinning due to Dynamic Spin-Vortex Interaction in aSuperconductor/Ferromagnet Multilayer
WU Hong-Ye, ZOU Tao, CHENG Zhao-Hua, SUN Young
State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190
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WU Hong-Ye, ZOU Tao, CHENG Zhao-Hua et al  2009 Chin. Phys. Lett. 26 017502
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Abstract We investigate the mutual interaction between superconductivity and ferromagnetism in a Nb/Ni81Fe19 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.
Keywords: 75.75.+a      75.70.Cn      74.78.Fk     
Received: 04 September 2008      Published: 24 December 2008
PACS:  75.75.+a  
  75.70.Cn (Magnetic properties of interfaces (multilayers, superlattices, heterostructures))  
  74.78.Fk (Multilayers, superlattices, heterostructures)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/26/1/017502       OR      https://cpl.iphy.ac.cn/Y2009/V26/I1/017502
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WU Hong-Ye
ZOU Tao
CHENG Zhao-Hua
SUN Young
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