Specific heat and ac susceptibility of Hg{sub 0.8}Cu{sub 0.2}Ba{sub 2}CuO{sub 4+{delta}} single crystals with T{sub C}=95K
Journal Article
·
· Physical Review, B: Condensed Matter
- Centre de Recherches sur les Tres Basses Temperatures, CNRS, Boite Postale 166X, 38042 Grenoble (France)
- CRISMAT, ISMRA et Universite de Caen, UMR 6508, 6 bd Marechal Juin, 14050 Caen Cedex (France)
We report on the specific heat and magnetic susceptibility of several single crystals of the superconducting compound Hg{sub 0.8}Cu{sub 0.2}Ba{sub 2}CuO{sub 4+{delta}} with optimum T{sub C} (around 95 K), and a mass varying between 6 and 18 {mu}g. We analyze the heat-capacity data with the purpose of extracting the intrinsic behavior of the compound. The accent is put on the shape of the specific-heat anomaly, its height, its symmetry, and its temperature position with respect to the transition in the ac susceptibility. The specific-heat peak in Hg-1201 is seven times less than in YBCO in correlation with the computed density of state at the Fermi level. We define a parameter {beta} allowing a classification of the sample{close_quote}s quality. The specific-heat anomaly is asymmetric. These considerations allow us to conclude that this compound has a dimensionality intermediate between the three-dimensional YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (YBCO) and the two-dimensional Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} (BSCCO). {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 564844
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 17 Vol. 56; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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