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Coexistence of superconductivity and ferromagnetism in ferromagnet/superconductor proximity structures

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The European Physical Journal B - Condensed Matter and Complex Systems Aims and scope Submit manuscript

Abstract:

The Nambu spinor Green's function approach is applied to calculating the density of states (DOS) and superconducting order parameter in normal-metal/insulator/ferromagnet/superconductor (NM/I/FM/SC) junctions. It is found that the s-wave superconductivity and ferromagnetism can coexist near the FM/SC interface, which is induced by proximity effect. On the SC side, the spin-dependent DOS appears both within and without the energy gap. On the FM side, the superconducting order parameter displays a damped oscillation and the DOS exhibits some superconducting behavior. The calculated result for the DOS in FM for “0 state” and “π state” can reproduce recent tunneling spectra in Al/Al2O3/PdNi/Nb tunnel junctions.

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Authors and Affiliations

  1. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, PR China, , , , , , CN

    Guoya Sun, D.Y. Xing & R. Shen

  2. Department of Physics, The Chinese University of Hong Kong, Hong Kong, PR China, , , , , , HK

    H.Q. Lin

Authors
  1. Guoya Sun
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  2. D.Y. Xing
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  3. R. Shen
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  4. H.Q. Lin
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Received 1st July 2002 Published online 19 November 2002

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Sun, G., Xing, D., Shen, R. et al. Coexistence of superconductivity and ferromagnetism in ferromagnet/superconductor proximity structures. Eur. Phys. J. B 30, 33–38 (2002). https://doi.org/10.1140/epjb/e2002-00354-y

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  • DOI: https://doi.org/10.1140/epjb/e2002-00354-y

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