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DOI 10.1103/PhysRevB.62.9077
Title Nonlocal effects in magnetization of high-{kappa} superconductors
Creator/Author Kogan, V. G. ; Bud'ko, S. L. ; Fisher, I. R. ; Canfield, P. C.
Publication Date2000 Oct 01
OSTI IdentifierOSTI ID: 40205607
Other Number(s)Journal ID: ISSN 0163-1829; TRN: IM200110%%841
Resource TypeJournal Article
Resource RelationJournal Name: Physical Review B; Journal Volume: 62; Journal Issue: 13; Other Information: DOI: 10.1103/PhysRevB.62.9077; Othernumber: PRBMDO000062000013009077000001; 061037PRB; PBD: 1 Oct 2000
Sponsoring Org(US)
Subject71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; FLUCTUATIONS; MAGNETIZATION; MONOCRYSTALS; SUPERCONDUCTORS; SYMMETRY; VORTICES
Description/AbstractThe reversible magnetization M(T,H) in high quality single crystals of Lu(Ni{sub 1-x}Co{sub x}){sub 2}B{sub 2}C with x=0-0.09 is measured in a broad T,H domain and interpreted within London theory corrected for nonlocality of the current -- vector-potential relation. Profound deviations in the data from the standard London result, M{proportional_to}ln(H{sub c2}/H) in intermediate fields H{sub c1}<<H<<H{sub c2}, are seen in clean samples at low T 's.Unlike strongly anisotropic high-T{sub c} compounds, for nearly isotropic borocarbides this behavior cannot be attributed to fluctuations of weakly interacting pancake vortices. We show that the nonlocal London model describes qualitatively and consistently the whole set of M(T,H) data and, in particular, its temperature and the mean-free path dependence. The scaling field H{sub 0}, which arises in M=M(H/H{sub 0}) due to nonlocality, is found to be nearly proportional to the the field H{sub 2} at which the vortex lattice undergoes the symmetry change (the ''square-to-hex'' transition).
PublisherThe American Physical Society
Country of PublicationUnited States
LanguageEnglish
FormatMedium: X; Size: page(s) 9077-9082
System Entry Date2008 Feb 09

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