Critical field enhancement in hybrid superconductor/ferromagnet mesoscopic disks

Schildermans, N.; Silhanek, Alejandro; Sautner, J.; Metlushko, V.; Vavassori, P.; Moshchalkov, V. V.

doi:10.1063/1.3074098

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Article (Scientific journals)

Critical field enhancement in hybrid superconductor/ferromagnet mesoscopic disks

Schildermans, N.; Silhanek, Alejandro; Sautner, J. et al.

2009 • In Journal of Applied Physics, 105 (2)

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https://hdl.handle.net/2268/102354

DOI
10.1063/1.3074098

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Keywords :

composite superconductors; ferromagnetic materials; magnetic moments; nucleation; remanence

Abstract :

[en] We investigated experimentally the nucleation of superconductivity in a mesoscopic hybrid structure, consisting of a thin superconducting disk covered with a ferromagnetic layer with an in-plane magnetic moment. By applying a magnetic field in the plane of the structure, the remanent magnetic state of the ferromagnet can be switched from a flux-closure state where field lines are confined inside the ferromagnet to a polarized state with nonzero stray fields at the edges. This change in the magnetic state causes a drastic modification on the superconductor/normal-state phase boundary of the hybrid sample. In the polarized state a re-entrant transition line and a strong broadening of the phase boundary are observed.

Disciplines :

Physics

Author, co-author :

Schildermans, N.

Silhanek, Alejandro ; Katholieke Universiteit Leuven - KUL

Sautner, J.

Metlushko, V.

Vavassori, P.

Moshchalkov, V. V.

Language :

English

Title :

Critical field enhancement in hybrid superconductor/ferromagnet mesoscopic disks

Publication date :

2009

Journal title :

Journal of Applied Physics

ISSN :

0021-8979

eISSN :

1089-7550

Publisher :

American Institute of Physics, Melville, United States - New York

Volume :

105

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 10 November 2011

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