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Coexistence of ferromagnetism and superconductivity in normal mental/superconductor/ferromagnet structures |
Yu Hua-Ling(郁华玲)†ger, Peng Ju(彭菊), and Jin Ben-Xi(金本喜) |
School of Physics and Electronic Electrical Engineering and Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, Huaiyin Normal University, Huaian 223300, China |
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Abstract We extend the Blonder, Tinkham and Klapwijk theory to the study of the inverse proximity effects in the normal mental/superconductor/ferromagnet structures. In the superconducting film, there are the gapless superconductivity and the spin-dependent density of states both within and without the energy gap. It indicates an appearance of the inverse-proximity-effect-induced ferromagnetism and a coexistence of ferromagnetism and superconductivity near the interface. The influence of exchange energy in the ferromagnet and barrier strength at the superconductor/ferromagnet interface on the inverse proximity effects is discussed.
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Received: 28 June 2009
Revised: 08 March 2010
Accepted manuscript online:
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PACS:
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74.45.+c
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(Proximity effects; Andreev reflection; SN and SNS junctions)
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74.20.-z
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(Theories and models of superconducting state)
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74.25.Ha
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(Magnetic properties including vortex structures and related phenomena)
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74.25.Jb
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(Electronic structure (photoemission, etc.))
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74.78.-w
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(Superconducting films and low-dimensional structures)
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75.30.Cr
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(Saturation moments and magnetic susceptibilities)
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Fund: Project supported by the Special Funds of the National Natural Science Foundation of China (Grant Nos. 10847132 and 10847133), and the Natural Science Foundation of Education Burean of Jiangsu Province, China (Grant No. 07KJD140024). |
Cite this article:
Yu Hua-Ling(郁华玲), Peng Ju(彭菊), and Jin Ben-Xi(金本喜) Coexistence of ferromagnetism and superconductivity in normal mental/superconductor/ferromagnet structures 2010 Chin. Phys. B 19 087203
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