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Atomic Scale Structure of Twin Boundary In Y-Ba-Cu-O Superconductors

Published online by Cambridge University Press:  25 February 2011

Yimei Zhu ,
M. Suenaga ,
Youwen Xu  and
M. Kawasaki
Yimei Zhu
Affiliation:
Department of Applied Science, Brookhaven National Laboratory, Upton, NY 11973
M. Suenaga
Affiliation:
Department of Applied Science, Brookhaven National Laboratory, Upton, NY 11973
Youwen Xu
Affiliation:
Department of Applied Science, Brookhaven National Laboratory, Upton, NY 11973
M. Kawasaki
Affiliation:
JEOL USA, Inc. Peabody, MA 01960
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Abstract

High resolution electron microscopy of the twin boundary layers in YBa2(Cu1-xMx)3O7–8 for x=0 and 0.02 and M=Zn, Fe and Al showed that the boundary widths are ∼1 nm for the pure and the Zn substituted YBa2Cu3O7, 2.5∼3 nm for the Fe and Al substituted oxide. It was found that the lattice plane is shifted across the twin boundary by (1/3 ∼ 1/2)·2d(110) along the boundary. The broadening of the layer for the cases of Fe and Al is also thought to be associated with a reduction of the twin boundary energy, which also leads to an increased twin density.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 159: Symposium C – Atomic Scale Structure of Interfaces , 1989 , 413
Copyright
Copyright © Materials Research Society 1990

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References

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