| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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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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| Cite this article: |
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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.
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| Keywords:
75.75.+a
75.70.Cn
74.78.Fk
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Received: 04 September 2008
Published: 24 December 2008
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| PACS: |
75.75.+a
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75.70.Cn
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(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
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74.78.Fk
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(Multilayers, superlattices, heterostructures)
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