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Phonon Anomaly at Tc In (Y/Er)Ba2Cu3O7–δ

Published online by Cambridge University Press:  28 February 2011

Rajeshwar P. Sharma ,
L. E. Rehn ,
P. Baldo  and
J. Z. Liu
Rajeshwar P. Sharma
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
L. E. Rehn
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
P. Baldo
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
J. Z. Liu
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
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Abstract

Ion channeling in single crystals of (Y/Er)Ba2Cu3O7–δ reveal an abrupt change (~0.01Å) at the superconducting transition temperature (Tc) in displacements of the Cu and O atoms perpendicular to the [001] direction. This anomalous change in atomic displacements shifts directly with stoichiometry-induced changes in Tc. Blocking patterns indicate no large structural changes across Tc.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 1033
Copyright
Copyright © Materials Research Society 1990

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