Anomalies in the internal friction and sound velocity in the high-temperature superconductor La/sub 1. 8/Sr/sub 0. 2/CuO/sub 4/
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
The internal friction Q/sup -1/ and the Young's-modulus sound velocity v/sub E/ have been measured in La/sub 1.8/Sr/sub 0.2/CuO/sub 4/ using the vibrating-reed technique. Measurements were performed at a frequency of 700 Hz at temperatures between 0.2 and 100 K. A drastic change of slope in the internal friction versus temperature curve is observed at T = 44 K just above the superconducting transition temperature T/sub c/ = 40 K. A plateau in Q/sup -1/ is observed between 44 and 5 K. The sound velocity shows a decrease with decreasing temperature between 100 and 20 K and remains almost constant between 2 and 0.2 K.
- Research Organization:
- Centro Atomico Bariloche, Instituto Balseiro, 8400 Bariloche, Argentina
- OSTI ID:
- 6417667
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 36:4; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DATA
EXPERIMENTAL DATA
FRICTION
INFORMATION
INTERNAL FRICTION
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LOW TEMPERATURE
MECHANICAL PROPERTIES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SOUND WAVES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
YOUNG MODULUS
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DATA
EXPERIMENTAL DATA
FRICTION
INFORMATION
INTERNAL FRICTION
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LOW TEMPERATURE
MECHANICAL PROPERTIES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SOUND WAVES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
YOUNG MODULUS