Gigahertz ultrasound in single crystal superconducting YBa2Cu3O7

Brage Golding; W. H. Haemmerle; L. F. Schneemeyer; J. V. Waszczak

Gigahertz ultrasound in single crystal superconducting YBa₂Cu₃O₇

Brage Golding, W. H. Haemmerle, L. F. Schneemeyer, J. V. Waszczak

Chemistry and Biochemistry

Research output: Contribution to journal › Conference article › peer-review

14 Scopus citations

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 T_c at 88 K. A discontinuous sound velocity is observed at T_c for propagation parallel and perpendicular to the c axis. Strain derivatives of T_c are evaluated using mean field theory. Below 1 K the temperature-dependent sound velocity has positive slope, which indicates tunneling of defects.

Original language	English
Pages (from-to)	1079-1083
Number of pages	5
Journal	Ultrasonics Symposium Proceedings
Volume	2
State	Published - 1988
Event	IEEE 1988 Ultrasonics Symposium - Proceedings - Chicago, IL, USA Duration: 2 Oct 1988 → 5 Oct 1988

Cite this

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title = "Gigahertz ultrasound in single crystal superconducting YBa2Cu3O7",

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.",

author = "Brage Golding and Haemmerle, {W. H.} and Schneemeyer, {L. F.} and Waszczak, {J. V.}",

year = "1988",

language = "English",

volume = "2",

pages = "1079--1083",

journal = "Ultrasonics Symposium Proceedings",

issn = "0090-5607",

note = "IEEE 1988 Ultrasonics Symposium - Proceedings ; Conference date: 02-10-1988 Through 05-10-1988",

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TY - JOUR

T1 - Gigahertz ultrasound in single crystal superconducting YBa2Cu3O7

AU - Golding, Brage

AU - Haemmerle, W. H.

AU - Schneemeyer, L. F.

AU - Waszczak, J. V.

PY - 1988

Y1 - 1988

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.

UR - http://www.scopus.com/inward/record.url?scp=0024167157&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:0024167157

SN - 0090-5607

VL - 2

SP - 1079

EP - 1083

JO - Ultrasonics Symposium Proceedings

JF - Ultrasonics Symposium Proceedings

T2 - IEEE 1988 Ultrasonics Symposium - Proceedings

Y2 - 2 October 1988 through 5 October 1988

ER -

Gigahertz ultrasound in single crystal superconducting YBa₂Cu₃O₇

Abstract

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