Article (Scientific journals)
Different regimes of nucleation of superconductivity in mesoscopic superconductor/ferromagnet hybrids
Schildermans, N.; Aladyshkin, A Yu; Silhanek, Alejandro et al.
2008In Physical Review. B, Condensed Matter, 77 (21)
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Keywords :
superconductivity
Abstract :
[en] The competition between two regimes of the nucleation of superconductivity is investigated experimentally and theoretically in a mesoscopic disk-shaped superconductor/ferromagnet hybrid. By changing the magnetic state of a multilayered Co/Pt disk one can reversibly affect the magnetic-field dependence of the critical temperature T(c)(H) of an Al layer. We demonstrate that an enhancement of the magnetic field near the edge of the out-of-plane magnetized disk either stimulates the nucleation of superconductivity at the disk perimeter due to the field compensation effect or prevents it due to edge magnetic barrier (for relatively low parallel to H parallel to values). As a consequence, the presence of such magnetic-field pattern makes it possible to eliminate boundary effects for mesoscopic superconducting samples. Switching from one nucleation regime to another while sweeping H leads to an abrupt change of the slope of the T(c)(H) envelope.
Disciplines :
Physics
Author, co-author :
Schildermans, N.
Aladyshkin, A Yu
Silhanek, Alejandro  ;  Katholieke Universiteit Leuven - KUL
de Vondel, J Van
Moshchalkov, V. V.
Language :
English
Title :
Different regimes of nucleation of superconductivity in mesoscopic superconductor/ferromagnet hybrids
Publication date :
2008
Journal title :
Physical Review. B, Condensed Matter
ISSN :
0163-1829
eISSN :
1095-3795
Publisher :
American Institute of Physics, New York, United States - New York
Volume :
77
Issue :
21
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 10 November 2011

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