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Proximity effect in superconducting-ferromagnetic granular structures

机译：超导铁磁颗粒结构中的邻近效应

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摘要

We examined the proximity effect in granular films made of Pb, a superconductor, and Ni, a ferromagnet, with various compositions. Slow decay of the critical temperature as a function of the relative volume concentration of Ni per sample was demonstrated by our measurements, followed by a saturation of T_c. Using an approximate theoretical description of our granular system in terms of a layered one, we show that our data can only be reasonably fitted by a trilayer model. This indicates the importance of the interplay between different ferromagnetic grains, which should lead to triplet Cooper pairing.
机译：我们研究了由铅（一种超导体）和镍（一种铁磁体）制成的粒状薄膜在各种组成下的邻近效应。通过我们的测量证明了临界温度的缓慢衰减与每个样品中镍的相对体积浓度的关系，随后出现T_c饱和。使用关于分层系统的近似理论描述，我们表明我们的数据只能由三层模型合理地拟合。这表明了不同铁磁晶粒之间相互作用的重要性，这将导致三重库珀配对。

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  • 来源
    《Physical review》 |2018年第1期|014520.1-014520.7|共7页
  • 作者

    Hadar Greener; Victor Shelukhin; Michael Karpovski; Moshe Goldstein; Alexander Palevski;

  • 作者单位

    School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 6997801, Israel;

    School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 6997801, Israel;

    School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 6997801, Israel;

    School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 6997801, Israel;

    School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 6997801, Israel;

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