Critical temperature oscillations and reentrant superconductivity due to the FFLO like state in F/S/F trilayers

Critical temperature oscillations and reentrant superconductivity due to the FFLO like state in F/S/F trilayers
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F/S/F 三层中的 FFLO 状态导致临界温度振荡和重入超导性

DOI:
10.1002/andp.201100133
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发表时间:
2012
期刊:
影响因子:
2.4
通讯作者:
R. Tidecks
R. Tidecks
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
J. Kehrle;V. I. Zdravkov;G. Obermeier;J. Garcia-Garcia;A. Ullrich;C. Müller;R. Morari;A. S. Sidorenko;S. Horn;L. R. Tagirov;R. Tidecks

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铁磁体/超导体/铁磁体(F/S/F)三层,其中Fulde-Ferrell Larkin-Ovchinnikov(FFLO)类态的建立导致超导配对波函数的干涉效应,形成超导自旋阀的核心。在这样的三层中实现强临界温度振荡,作为铁磁层厚度的函数,或者甚至更有效地,重入超导性,是获得大自旋阀效应的关键条件,即临界温度的大偏移。这两种现象在本工作中研究的Cu_(41)Ni_(59)/Nb/Cu_(41)Ni_(59)三层膜中得到了实验证实。
Ferromagnet/Superconductor/Ferromagnet (F/S/F) trilayers, in which the establishing of a Fulde‐Ferrell Larkin‐Ovchinnikov (FFLO) like state leads to interference effects of the superconducting pairing wave function, form the core of the superconducting spin valve. The realization of strong critical temperature oscillations in such trilayers, as a function of the ferromagnetic layer thicknesses or, even more efficient, reentrant superconductivity, are the key condition to obtain a large spin valve effect, i.e. a large shift in the critical temperature. Both phenomena have been realized experimentally in the Cu41Ni59/Nb/Cu41Ni59trilayers investigated in the present work.
DOI: 10.1103/physrevb.38.2388
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