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Deriving the Ginzburg-Landau parameter from heat-capacity data on magnetic superconductors with Schottky anomalies

Leigh, N.R.; Hampshire, D.P.

Deriving the Ginzburg-Landau parameter from heat-capacity data on magnetic superconductors with Schottky anomalies Thumbnail


Authors

N.R. Leigh

D.P. Hampshire



Abstract

The specific heat of the Chevrel phase (CP) magnetic superconductors (Sn0.65Eu0.35)Mo6S8 and (Sn0.50Eu0.50)Mo6S8 have been measured in high magnetic fields. The Schottky contributions, including self-field and exchange terms, were calculated and then subtracted to improve determination of the Ginzburg-Landau parameter. Two approximate high-field specific-heat equations are presented which are used to find the free-ion ground state of these CP compounds and the doublet ground-state properties in some rare-earth high-temperature superconductors without advanced computation. The approximate equations allow simple calculation of the degeneracy and moments of the ground-state multiplet and the ordering temperature.

Citation

Leigh, N., & Hampshire, D. (2003). Deriving the Ginzburg-Landau parameter from heat-capacity data on magnetic superconductors with Schottky anomalies. Physical review B, 68(17), https://doi.org/10.1103/physrevb.68.174508

Journal Article Type Article
Publication Date 2003-11
Deposit Date Nov 28, 2006
Publicly Available Date Sep 15, 2010
Journal Physical Review B
Print ISSN 1098-0121
Electronic ISSN 1550-235X
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 68
Issue 17
DOI https://doi.org/10.1103/physrevb.68.174508
Keywords Temperature.

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Copyright Statement
© 2003 by The American Physical Society. All rights reserved.




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