SPECIFIC-HEAT MEASUREMENTS UP TO 14 T OF THE HIGH-TEMPERATURE SUPERCONDUCTOR (CA0.4LA0.6)(BA1.35LA0.65)CU3O-DELTA FOR DIFFERENT OXYGEN CONCENTRATIONS

Authors
ROULIN M JUNOD A
Citation
M. Roulin et A. Junod, SPECIFIC-HEAT MEASUREMENTS UP TO 14 T OF THE HIGH-TEMPERATURE SUPERCONDUCTOR (CA0.4LA0.6)(BA1.35LA0.65)CU3O-DELTA FOR DIFFERENT OXYGEN CONCENTRATIONS, Physica. C, Superconductivity, 259(1-2), 1996, pp. 193-198
Citations number
14
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
259
Issue
1-2
Year of publication
1996
Pages
193 - 198
Database
ISI
SICI code
0921-4534(1996)259:1-2<193:SMUT1T>2.0.ZU;2-N
Abstract
(CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Odelta belongs to the same 1:2:3 family as YBa2Cu3Odelta (YBCO). We report the first measurement of the speci fic heat at high temperature (40-150 K) and high fields (0-14 T) for a series of superconducting ceramics with x = 0.4. The effect of the ox ygen content is studied for delta = 7.09-7.19. The specific-heat anoma ly at T-c, which does not exceed 1% of the total heat capacity in the most favorable case, changes from a 3D YBCO-like behavior at optimal d oping to a 2D Bi2Sr2CaCu2O8-like behavior in the underdoped regime.