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  Specific heat and disorder in the mixed state of non-magnetic borocarbides

Lipp, D., Schneider, M., Gladun, A., Drechsler, S. L., Freudenberger, J., Fuchs, G., et al. (2002). Specific heat and disorder in the mixed state of non-magnetic borocarbides. Europhysics Letters, 58(3), 435-441. doi:10.1209/epl/i2002-00392-7.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-3157-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-32C3-B
Genre: Journal Article

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 Creators:
Lipp, D., Author
Schneider, M., Author
Gladun, A.1, Author              
Drechsler, S. L., Author
Freudenberger, J., Author
Fuchs, G., Author
Nenkov, K., Author
Müller, K. H., Author
Cichorek, T.1, Author              
Gegenwart, P.2, Author              
Affiliations:
1Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              

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 Abstract: 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.

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Language(s): eng - English
 Dates: 2002-05
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 17797
ISI: 000175271000019
DOI: 10.1209/epl/i2002-00392-7
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Title: Europhysics Letters
  Alternative Title : Europhys. Lett.
Source Genre: Journal
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Pages: - Volume / Issue: 58 (3) Sequence Number: - Start / End Page: 435 - 441 Identifier: ISSN: 0295-5075