Article (Scientific journals)
Controllable morphology of flux avalanches in microstructured superconductors
Motta, M.; Colauto, F.; Vestgarden, J.I. et al.
2014In Physical Review. B, Condensed Matter
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Keywords :
thermomagnetic instabilities; flux avalanches; nanostructured superconductors
Abstract :
[en] The morphology of abrupt bursts of magnetic flux into superconducting films with engineered periodic pinning centers (antidots) has been investigated. Guided flux avalanches of thermomagnetic origin develop a tree-like structure, with the main trunk perpendicular to the borders of the sample, while secondary branches follow well-defi ned directions determined by the geometrical details of the underlying periodic pinning landscape. Strikingly, we demonstrate that in a superconductor with relatively weak random pinning, the morphology of such flux avalanches can be fully controlled by proper combinations of lattice symmetry and antidot geometry. Moreover, the resulting flux patterns can be reproduced, to the fi nest details, by simulations based on a phenomenological thermomagnetic model. In turn, this model can be used to predict such complex structures and to estimate physical variables of more di fficult experimental access, such as the local values of temperature and electric fi eld.
Disciplines :
Physics
Author, co-author :
Motta, M.;  Universidade de Sao Carlos, Brazil
Colauto, F.;  Universidade de Sao Carlos, Brazil
Vestgarden, J.I.;  University of Oslo - UiO
Fritzsche, J.;  Chalmers Univerity of Technology
Timmermans, M.;  Katholieke Universiteit Leuven - KUL
Cuppens, J.;  Katholieke Universiteit Leuven - KUL
Attanasio, C.;  CNR-SPIN Salerno
Cirillo, C.;  CNR-SPIN Salerno
Moshchalkov, V.V.;  Katholieke Universiteit Leuven - KUL
Van de Vondel, J.;  Katholieke Universiteit Leuven - KUL
Johansen, T.H.;  University of Oslo - UiO
Ortiz, W.A.;  Univeridade de Sao Carlos, Brazil
Silhanek, Alejandro  ;  Université de Liège - ULiège > Département de physique > Physique de la matière condensée
More authors (3 more) Less
Language :
English
Title :
Controllable morphology of flux avalanches in microstructured superconductors
Publication date :
2014
Journal title :
Physical Review. B, Condensed Matter
ISSN :
0163-1829
eISSN :
1095-3795
Publisher :
American Institute of Physics, New York, United States - New York
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 01 April 2014

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