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Ultrasonic Study of the Low Temperature Structural Phase Transition in Yba2Cu3O7-δ. and its Dependence on Oxygen Concentration

Published online by Cambridge University Press:  28 February 2011

J. Toulouse ,
X.Q. Wang  and
D.J.L. Hong
J. Toulouse
Affiliation:
Physics Department Materials Research Center, Lehigh University, Bethlehem, PA 18015.
X.Q. Wang
Affiliation:
Physics Department
D.J.L. Hong
Affiliation:
Materials Research Center, Lehigh University, Bethlehem, PA 18015.
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Abstract

Elastic and structural instability have been reported in YBa2Cu3O7‐δbetween 210K and 270K. We have carried out an ultrasonic study of these instabilities as a function of both oxygen concentration and annealing temperature. The results strongly indicate that an athermal (martensitic‐type) transition starts at a temperature Ts which decreases with decreasing oxygen concentration. A linear relationship between Ts and Tc suggests that the second phase formed is essential for the high Tc.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 201
Copyright
Copyright © Materials Research Society 1990

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References

1 Toulouse, J., Wang, X.M. and Hong, D.J.L., Phys. Rev. B 38, 7077 (1988).Google Scholar
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3 Golding, B. (private communication).Google Scholar
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