Gigahertz ultrasound in single crystal superconducting YBa2Cu3O7

Brage Golding, W. H. Haemmerle, Lynn Schneemeyer, J. V. Waszczak

Research output: Contribution to journalConference article

11 Citations (Scopus)

Abstract

Anisotropic sound propagation at 1 GHz in single-crystal YBa2Cu3O7 is described. Longitudinal phonons have been studied from 0.01 K to 300 K, with emphasis on the temperature region near the superconducting transition Tc at 88 K. A discontinuous sound velocity is observed at Tc for propagation parallel and perpendicular to the c axis. Strain derivatives of Tc are evaluated using mean field theory. Below 1 K the temperature-dependent sound velocity has positive slope, which indicates tunneling of defects.

Original languageEnglish
Pages (from-to)1079-1083
Number of pages5
JournalUltrasonics Symposium Proceedings
Volume2
StatePublished - 1 Dec 1988
EventIEEE 1988 Ultrasonics Symposium - Proceedings - Chicago, IL, USA
Duration: 2 Oct 19885 Oct 1988

Fingerprint

Acoustic wave velocity
Ultrasonics
Single crystals
Mean field theory
Phonons
Acoustic waves
Derivatives
Temperature
Defects

Cite this

Golding, Brage ; Haemmerle, W. H. ; Schneemeyer, Lynn ; Waszczak, J. V. / Gigahertz ultrasound in single crystal superconducting YBa2Cu3O7. In: Ultrasonics Symposium Proceedings. 1988 ; Vol. 2. pp. 1079-1083.
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Gigahertz ultrasound in single crystal superconducting YBa2Cu3O7. / Golding, Brage; Haemmerle, W. H.; Schneemeyer, Lynn; Waszczak, J. V.

In: Ultrasonics Symposium Proceedings, Vol. 2, 01.12.1988, p. 1079-1083.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Gigahertz ultrasound in single crystal superconducting YBa2Cu3O7

AU - Golding, Brage

AU - Haemmerle, W. H.

AU - Schneemeyer, Lynn

AU - Waszczak, J. V.

PY - 1988/12/1

Y1 - 1988/12/1

N2 - Anisotropic sound propagation at 1 GHz in single-crystal YBa2Cu3O7 is described. Longitudinal phonons have been studied from 0.01 K to 300 K, with emphasis on the temperature region near the superconducting transition Tc at 88 K. A discontinuous sound velocity is observed at Tc for propagation parallel and perpendicular to the c axis. Strain derivatives of Tc are evaluated using mean field theory. Below 1 K the temperature-dependent sound velocity has positive slope, which indicates tunneling of defects.

AB - Anisotropic sound propagation at 1 GHz in single-crystal YBa2Cu3O7 is described. Longitudinal phonons have been studied from 0.01 K to 300 K, with emphasis on the temperature region near the superconducting transition Tc at 88 K. A discontinuous sound velocity is observed at Tc for propagation parallel and perpendicular to the c axis. Strain derivatives of Tc are evaluated using mean field theory. Below 1 K the temperature-dependent sound velocity has positive slope, which indicates tunneling of defects.

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M3 - Conference article

AN - SCOPUS:0024167157

VL - 2

SP - 1079

EP - 1083

JO - Ultrasonics Symposium Proceedings

JF - Ultrasonics Symposium Proceedings

SN - 0090-5607

ER -