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Specific heat of polycrystalline YBa2Cu3O7-x in a magnetic field

โœ Scribed by D.M. Ginsberg; M.E. Reeves; S.E. Stupp; T.A. Friedmann; F. Slakey; M.V. Klein

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
118 KB
Volume
162-164
Category
Article
ISSN
0921-4534

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โœฆ Synopsis

The specific heat of high-purity, sintered, YBa2Cu307-x powder has been measured. The lowtemperature specific heat had only a linear term (with a zero-field coefficient of 4.37 mJ mole K 2) and a cubic term (corresponding to a Debye temperature of 375 K); both terms varied with field. No Schottky peak was evident. Raman-effect data obtained on our sample showed that less than one third of the linear term could arise from the presence of BaCuO2. Using anisotropic Ginzburg-Landau theory in the London limit, we were unable to account for the reduction of the cubic term, and could account for only part of the enhancement of the linear term with increasing field.

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