Frequency-dependent ultrasonic attenuation of YBa/sub 2/Cu/sub 3/O/sub 7/

Journal Article · Thu Dec 01 04:00:00 EST 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.38.11988· OSTI ID:6600799

Sun, K J; Winfree, W P; Xu, M F; Sarma, B K; Levy, M; Caton, R; Selim, R

At temperatures near T/sub c/ experimental measurements of temperature-dependent ultrasonic attenuation at three frequencies exhibit maxima, and velocity measurements display softening of the lattice. These attenuation maxima result from a relaxation process which occurs around the superconducting transition, and the softening of velocity arount T/sub c/ may evidence a structural instability in YBa/sub 2/Cu/sub 3/O/sub 7/ at these temperatures.

• Research Organization: NASA Langley Research Center, Hampton, Virginia 23665
• OSTI ID: 6600799
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:16; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ATTENUATION
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
DATA
EXPERIMENTAL DATA
FREQUENCY DEPENDENCE
FREQUENCY RANGE
GRAIN BOUNDARIES
INFORMATION
LOW TEMPERATURE
MHZ RANGE
MHZ RANGE 01-100
MICROSTRUCTURE
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RELAXATION TIME
SOUND WAVES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
ULTRASONIC WAVES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES