Enhancement of Superconductivity by Exchange Bias

Details Enhancement of Superconductivity by Exchange Bias Enhancement of Superconductivity by Exchange Bias

2007-01-12

arxiv.org/abs/cond-mat/0701271v1

Phys. Rev. B 75, 014501 (2007)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.75.014501

In this work we study the transport properties of hybrids that consist of exchange biased ferromagnets (FMs) combined with a low-Tc superconductor (SC). Not only different FMs but also various structural topologies have been investigated: results for multilayers of La(1-x)CaxMnO3 combined with Nb in the form of [La0.33Ca0.67MnO3/La0.60Ca0.40MnO3]15/Nb, and for more simple Ni80Fe20/Nb/Ni80Fe20 trilayers and Ni80Fe20/Nb bilayers are presented. The results obtained in all hybrid structures studied in this work clearly uncover that the exchange bias mechanism promotes superconductivity. Our findings assist the understanding of the contradictory results that have been reported in the recent literature regarding the transport properties of relative FM/SC/FM spin valves.

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