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          Institute: MPI für Chemische Physik fester Stoffe     Collection: publications 2002     Display Documents

ID: 17797.0, MPI für Chemische Physik fester Stoffe / publications 2002
Specific heat and disorder in the mixed state of non-magnetic borocarbides
Authors:Lipp, D.; Schneider, M.; Gladun, A.; Drechsler, S. L.; Freudenberger, J.; Fuchs, G.; Nenkov, K.; Müller, K. H.; Cichorek, T.; Gegenwart, P.
Date of Publication (YYYY-MM-DD):2002-05
Title of Journal:Europhysics Letters
Journal Abbrev.:Europhys. Lett.
Issue / Number:3
Start Page:435
End Page:441
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:The temperature and magnetic-field dependence of the specific heat c(p)(T, H) in the superconducting (sc) mixed state as well as the upper critical field H-c2(T) have been measured for polycrystalline YxLu1-xNi2B2C and Y(Ni(1-y)Pty)(2)B2C samples. The linear-in-T electronic specific-heat contribution gamma(H) . T exhibits significant deviations from the usual linear-in-H law resulting in a disorder-dependent negative curvature of gamma(H). The H-c2(T) data point to the quasi-clean limit for (Y, Lu)-substitutions and to a transition to the quasi-dirty limit for (Ni, Pt)-substitutions. The gamma(H)-dependence is discussed in the unitary d-wave as well as in the quasi-clean s-wave limits. From a consideration of gamma(H) data only, d- wave pairing cannot be ruled out.
Comment of the Author/Creator:Date: 2002, MAY
External Publication Status:published
Document Type:Article
Communicated by:Ina Wanschura
Affiliations:MPI für chemische Physik fester Stoffe
External Affiliations:Tech Univ Dresden, Inst Halbleiter & Mikrosyst Tech, D-01062; Dresden, Germany; Tech Univ Dresden, Inst Halbleiter & Mikrosyst Tech, D-01062 Dresden, Germany; Tech Univ Dresden, Inst Tieftemp Phys, D-01062 Dresden, Germany; Inst Festkorper & Werkstofforsch EV, D-01171 Dresden, Germany; Max Planck Inst Chem Phys Fester Stoffe, D-01187 Dresden, Germany
Identifiers:ISI:000175271000019 [ID No:1]
ISSN:0295-5075 [ID No:2]
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