Angular dependence of the latent heat of vortex-lattice melting in untwinned YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}
- Physik Institut, Universitaet Zuerich, Winterthurerstrasse 190, 8057 Zuerich (Switzerland)
- Lawrence Berkeley National Laboratory and Department of Chemistry, University of California, Berkeley, California 94720 (United States)
- Science and Technology Center for Superconductivity, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
We measured the latent heat of vortex-lattice melting for varying angles {Theta} between the external magnetic field {ital H} and the {ital c} axis of an untwinned YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} single crystal. The discontinuity in entropy at melting, {Delta}S per unit volume of sample, depends solely on the temperature {ital T} where melting occurs, but does not depend on {Theta} and the corresponding melting field H{sub m}(T,{Theta}). The {ital T} dependence of {Delta}S near the critical temperature T{sub c} can be quantitatively explained by a recently developed theory based on the London model that accounts for the strong {ital T} dependence of the model parameters near T{sub c}. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 663724
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 17 Vol. 58; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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