Competition between proximity-induced superconductivity and pair breaking: Ag sandwiched between Nb and Fe

H. Stalzer; A. Cosceev; C. SuergersH. v. Loehneysen

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Competition between proximity-induced superconductivity and pair breaking: Ag sandwiched between Nb and Fe

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摘要

The magnetization of superconductor and/or normal-metal (Nb/Ag) double layers is investigated in dependence on temperature T and magnetic field B. Screening currents in the normal-metal induced by the proximity effect give rise to a diamagnetic transition in a weak magnetic field at a temperature T_b. The phase transition is suppressed when Fe is in direct contact with Ag. Surprisingly, the diamagnetic signal of Ag is recovered for small Ag film thickness d_(Ag). These findings are qualitatively explained by the competition in the Ag layer between proximity-induced superconductivity by the Nb layer and pair breaking by the ferromagnetic Fe layer.

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《Physical review, B. Condensed matter and materials physics》 |2007年第22期|224506.1-224506.4|共9页
作者
H. Stalzer; A. Cosceev; C. SuergersH. v. Loehneysen;
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作者单位

Physikalisches Institut and DFG Center for Functional Nanostructures, Universitaet Karlsruhe, D-76128 Karlsruhe, Germany;

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原文格式 PDF
正文语种英语
中图分类固体物理学;
关键词
proximity effects; Andreev effect; SN and SNS junctions; magnetic properties; superconducting films and low-dimensional structures;

Competition between proximity-induced superconductivity and pair breaking: Ag sandwiched between Nb and Fe

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