Article (Scientific journals)
Direct observation of the depairing current density in single-crystalline Ba0.5K0.5Fe2As2 microbridge with nanoscale thickness
Li, Jun; Yuan, Jie; Yuan, Ya-Hua et al.
2013In Applied Physics Letters, 103, p. 062603
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Keywords :
Fe-based superconductors; depairing current; microbridges
Abstract :
[en] We investigated the critical current density (Jc) of Ba0.5K0.5Fe2As2 single-crystalline microbridges with thicknesses ranging from 276 to 18 nm. The Jc of the microbridge with thickness down to 91 nm is 10.8 MA/cm2 at 35 K, and reaches 944.4 MA/cm2 by extrapolating Jc(T) to T = 0 K using a two-gap s-wave Ginzburg-Landau model, well in accordance with the depairing current limit. The temperature, magnetic field, and angular-dependence of Jc(T,H,q) indicated weaker field dependence and weakly anisotropic factor of 1.15 (1 T) and 1.26 (5 T), which also yielded the validity of the anisotropic Ginzburg-Landau scaling.
Disciplines :
Physics
Author, co-author :
Li, Jun;  Katholieke Universiteit Leuven - KUL
Yuan, Jie;  Tsukuba
Yuan, Ya-Hua;  Tsukuba
Ge, Jun-Yi;  Katholieke Universiteit Leuven - KUL
Li, Meng-Yue;  Tsukuba
Feng, Hai-Luke;  Tsukuba
Pereira, Paulo J.;  Katholieke Universiteit Leuven - KUL
Ishii, Akira;  Tsukuba
Hatano, Takeshi;  Tsukuba
Silhanek, Alejandro  ;  Université de Liège - ULiège > Département de physique > Physique de la matière condensée
Chibotaru, Liviu F.;  Katholieke Universiteit Leuven - KUL
Vanacken, Johan;  Katholieke Universiteit Leuven - KUL
Yamaura, Kazunari;  Tsukuba
Wang, Hua-Bing;  Tsukuba
Takayama-Muromachi, Eiji;  Hokkaido University
Moshchalkov, V.V.;  Katholieke Universiteit Leuven - KUL
More authors (6 more) Less
Language :
English
Title :
Direct observation of the depairing current density in single-crystalline Ba0.5K0.5Fe2As2 microbridge with nanoscale thickness
Publication date :
August 2013
Journal title :
Applied Physics Letters
ISSN :
0003-6951
eISSN :
1077-3118
Publisher :
American Institute of Physics, Melville, United States - New York
Volume :
103
Pages :
062603
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 07 August 2013

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