Phonon echoes in powders of high-T/sub c/ superconducting YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/

Journal Article · Sat Apr 01 04:00:00 EST 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.39.7351· OSTI ID:6317227

Nishihara, H; Hayashi, K; Okuda, Y; Kajimura, K

Strong rf phonon echoes have been observed in the superconducting state of powders of high-T/sub c/ YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/. We suggest that the coupling mechanism between rf fields and acoustic modes is different from that in the usual phonon echoes judging from the sudden disappearance of the echoes at T/sub c/ = 90 K and from the angular dependence of the echo intensity. The temperature dependence of T/sub 2//sup -1/ is tentatively ascribed to the ultrasonic attenuation due to electrons, and the energy gap parameter 2..delta../k/sub B/T/sub c/ is estimated to be 3--7.

• Research Organization: Institute for Solid State Physics, University of Tokyo, Roppongi 7, Tokyo 106, Japan
• OSTI ID: 6317227
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 39:10; 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
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ENERGY GAP
OXIDES
OXYGEN COMPOUNDS
PHONONS
POWDERS
QUASI PARTICLES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TYPE-II SUPERCONDUCTORS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES