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Mechanism of Twin Formation During the Tetragonal to Orthorhombic Transformation In Yba2Cu3O7-X

Published online by Cambridge University Press:  28 February 2011

Mehmet Sarikaya ,
Ilhan A. Aksay  and
Ryoichl Kikuchi
Mehmet Sarikaya
Affiliation:
Department of Materials Science and Engineering; and Advanced Materials Technology Center, Washington Technology Centers, University of Washington, Seattle, Washington, USA 98195
Ilhan A. Aksay
Affiliation:
Department of Materials Science and Engineering; and Advanced Materials Technology Center, Washington Technology Centers, University of Washington, Seattle, Washington, USA 98195
Ryoichl Kikuchi
Affiliation:
Department of Materials Science and Engineering; and Advanced Materials Technology Center, Washington Technology Centers, University of Washington, Seattle, Washington, USA 98195
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Abstract

The formation of twins in the YBa2Cu3O7‐x system has been studied theoretically on the basis of transmission electron microscopy observations. The shape of the lips of the twinned domains is determined from two elastic strains, one associated with the twin boundary and the other with the lattice distortion at the lip region. The tangent of the angle at the tip which was calculated from the model agrees with experimental observations sufficiently well. The growth mechanism of the twinned domains is analyzed with an energy minimization approach. The similarities of transformation characteristics in this system to those of other systems are briefly discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 805
Copyright
Copyright © Materials Research Society 1990

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