Magnetic field dependence of the specific heat of some high-T/sub c/
Description
The specific heats, C, of 5 samples of La/sub 1.85/M/sub 0.15/CuO/sub 4-y/ (M = Ca, Sr, Ba), one sample of La2CuO/sub 4-y/, and one sample of YBa2Cu3O/sub 9-y/ have been measured between 0.4 and 40K, in magnetic fields, H, to 7T. For the La/sub 1.85/M/sub 0.15/CuO/sub 4-y/ samples the H dependence of C near T/sub c/ and near 1K, where C is dominated by the electronic contribution, gives information about the fraction of the sample that is a bulk superconductor and the density of electronic states. The fraction of bulk superconductivity indicated by the Meissner effect does not correlate well with that indicated by C. La2CuO/sub 4-y/ has a linear term in C, in qualitative agreement with a theoretical prediction
Availability note (English)
Available from NTIS, PC A02/MF A01 as DE87011101.
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Additional details
Publishing Information
- Imprint Pagination
- 10 p.
- Report number
- LBL--23531
Conference
- Title
- 18. conference on low temperature physics.
- Dates
- 20-26 Aug 1987.
- Place
- Kyoto (Japan).
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 19016906
- Subject category
- S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Conference, Numerical Data
- Descriptors DEI
- EXPERIMENTAL DATA; LANTHANUM BASE ALLOYS; MAGNETIC FIELDS; MEISSNER-OCHSENFELD EFFECT; SPECIFIC HEAT; SUPERCONDUCTORS; TEMPERATURE DEPENDENCE; ULTRALOW TEMPERATURE; VERY LOW TEMPERATURE; YTTRIUM BASE ALLOYS
- Descriptors DEC
- ALLOYS; DATA; INFORMATION; LANTHANUM ALLOYS; NUMERICAL DATA; PHYSICAL PROPERTIES; RARE EARTH ALLOYS; THERMODYNAMIC PROPERTIES; YTTRIUM ALLOYS
Optional Information
- Secondary number(s)
- CONF-870873--8.