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Specific Heat Linear Term in YBa2Cu3O7−x and a Survey of Related Compounds

Published online by Cambridge University Press:  28 February 2011

A. P. Ramirez ,
R. J. Cava ,
G. P. Espinosa ,
J. P. Remeika ,
B. Batlogg ,
S. Zahurak  and
E. A. Rietman
A. P. Ramirez
Affiliation:
AT&T Bell Laboratories, Murray Hill, N. J. 07974
R. J. Cava
Affiliation:
AT&T Bell Laboratories, Murray Hill, N. J. 07974
G. P. Espinosa
Affiliation:
AT&T Bell Laboratories, Murray Hill, N. J. 07974
J. P. Remeika
Affiliation:
AT&T Bell Laboratories, Murray Hill, N. J. 07974
B. Batlogg
Affiliation:
AT&T Bell Laboratories, Murray Hill, N. J. 07974
S. Zahurak
Affiliation:
AT&T Bell Laboratories, Murray Hill, N. J. 07974
E. A. Rietman
Affiliation:
AT&T Bell Laboratories, Murray Hill, N. J. 07974
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Abstract

We have measured the specific heat, C, in the temperature range 0.3 to 20K and in magnetic fields up to 12 Tesla of several compounds related to the high-Tc superconductors. The linear term in C for YBa2Cu3O7−x is only weakly dependent on oxygen concentration in the range 0 ≤ × ≤ 0.7. The linear term in C changes by less than 10% at 10 Tesla for La1.98Sr.02CuO4, whereas for YBa2Cu3O7−x it is obscured by additional field-dependent structure. Magnetic ordering anomalies are observed in YBa2Cu2O5 at 10.6 K and in BaCuO2+6 at 9.3 K.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 99: Symposium AA – High-Temperature Superconductors , 1987 , 459
Copyright
Copyright © Materials Research Society 1988

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References

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