Contribution to collective works (Parts of books)
The Role of Nonlocality in the Pinning Properties of Borocarbides Materials
Silhanek, Alejandro; Thompson, J.R.; Civale, L. et al.
2004In Martins, Barry P. (Ed.) Frontiers in Superconductivity Research
 

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Keywords :
Borocarbides superconductors
Abstract :
[en] An experimental review on the influence of nonlocal electrodynamics in the vortex pinning properties of non-magnetic borocarbide superconductors is presented. We show that the pinning force density Fp exhibits a rich and complex anisotropic behavior that sharply contrast with the small mass anisotropy of these compounds. For magnetic fields H applied parallel to the crystallographic c-axis, the first order reorientation transition between two rhombic lattices manifests itself as a kink in Fp(H). For H⊥c-axis, a much larger Fp(H) and a slower relaxation rate is observed. In this field configuration, nonlocality induces a fourfold periodicity in Fp when H is rotated within the square basal plane. Unlike the out-of-plane anisotropy, which persists for increasing impurity levels, the in-plane fourfold anisotropy can be strongly suppressed by reducing the electronic mean free path. This result unambiguously demonstrate that the in-plane anisotropy is a consequence of nonlocal effects.
Disciplines :
Physics
Author, co-author :
Silhanek, Alejandro  ;  Katholieke Universiteit Leuven - KUL > Physics and Astronomy
Thompson, J.R.;  Oak Ridge National Laboratory
Civale, L.;  Los Alamos National Laboratory
Bud'ko, S.L.;  Ames Laboratory
Canfield, P.;  Ames Laboratory
Language :
English
Title :
The Role of Nonlocality in the Pinning Properties of Borocarbides Materials
Publication date :
2004
Main work title :
Frontiers in Superconductivity Research
Editor :
Martins, Barry P.
Publisher :
Nova Science Publishers
ISBN/EAN :
1-59454-005-5
Pages :
201-217
Available on ORBi :
since 06 May 2012

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