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Thermal properties of the high-T/sub c/ superconductors La/sub 1. 85/Sr/sub 0. 15/CuO/sub 4/ and YBa/sub 2/Cu/sub 3/O/sub 7/

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)
The heat capacity C/sub p/ of samples of La/sub 1.85/Sr/sub 0.15/CuO/sub 4/ and YBa/sub 2/Cu/sub 3/O/sub 7/ have been measured from 1.5 to 40 K, and the linear thermal expansivity ..cap alpha.. of La/sub 1.85/Sr/sub 0.15/CuO/sub 4/ measured in the range 2 to 80 K. The heat capacities show similar temperature dependencies and magnitudes (per gram) with a linear (tunnelling.) term dominating below 4 K. ..cap alpha.. also shows a comparable T term below 4 K and both C/sub p/ and ..cap alpha.. show a small discontinuity of approx. =1% near T/sub c/approx. =34 K.
Research Organization:
Commonwealth Scientific and Industrial Research Organization, Division of Applied Physics, Lindfield, Australia 2070
OSTI ID:
6140652
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 36:10; ISSN PRBMD
Country of Publication:
United States
Language:
English