Article (Scientific journals)
Enhanced pinning in superconducting thin films with graded pinning landscapes
Motta, M.; Colauto, F.; Ortiz, W.A. et al.
2013In Applied Physics Letters, 102, p. 212601
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Keywords :
superconductivity; vortex pinning
Abstract :
[en] A graded distribution of antidots in superconducting a-Mo79Ge21 thin films has been investigated by magnetization and magneto-optical imaging measurements. The pinning landscape has maximum density at the sample border, decreasing linearly towards the center. Its overall performance is noticeably superior than that for a sample with uniformly distributed antidots: For high temperatures and low fields, the critical current is enhanced, whereas the region of thermomagnetic instabilities in the field-temperature diagram is significantly suppressed. These findings confirm the relevance of graded landscapes on the enhancement of pinning efficiency, as recently predicted by Misko and Nori [Phys. Rev. B 85, 184506 (2012)].
Disciplines :
Physics
Author, co-author :
Motta, M.;  Universidade Federal de Sao Carlos, Brazil
Colauto, F.;  Universidade Federal de Sao Carlos, Brazil
Ortiz, W.A.;  Universidade Federal de Sao Carlos, Brazil
Fritzsche, J.;  Chalmers University of Technology, Sweden
Cuppens, J.;  Katholieke Universiteit Leuven - KUL
Gillijns, W.;  Katholieke Universiteit Leuven - KUL
Moshchalkov, V.V.;  Katholieke Universiteit Leuven - KUL
Johansen, T.H.;  University of Oslo, Norway
Sanchez, A.
Silhanek, Alejandro  ;  Université de Liège - ULiège > Département de physique > Physique de la matière condensée
Language :
English
Title :
Enhanced pinning in superconducting thin films with graded pinning landscapes
Publication date :
30 May 2013
Journal title :
Applied Physics Letters
ISSN :
0003-6951
eISSN :
1077-3118
Publisher :
American Institute of Physics, Melville, United States - New York
Volume :
102
Pages :
212601
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Crédit de démarrage ULg and FNRS
Available on ORBi :
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