Thermal conductivity of partially substituted YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}
- Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6116 (United States)
Partially substituted YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (Y123) samples are produced by replacing part of the Y with appropriate rare-earth elements and/or part of the Ba with Sr. Partial substitution has little effect on the normal-state resistivity or superconducting transition temperature, but should reduce the phonon part of the thermal conductivity, {lambda}{sub p}. Ambient temperature measurements on several polycrystalline samples show a thermal conductivity, {lambda}, reduction relative to Y123. The effect persists to lower temperatures and data for Y123 and Y{sub 0.5}Yb{sub 0.5}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} show that the {lambda} peak at T{sub c}/2 is also affected. {copyright} {ital 1999} {ital The American Physical Society}
- OSTI ID:
- 341398
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 21 Vol. 59; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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