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TEM Study of (015) Growth Twins in The Bi-Sr-Ca-Cu-O Superconductors Obtained by Melt Quench Technique

Published online by Cambridge University Press:  25 February 2011

Ohnishi N ,
Sankararaman M  and
Sato H
Ohnishi N
Affiliation:
School of Materials Engineering, Purdue University, West Lafayette, IN 47907
Sankararaman M
Affiliation:
School of Materials Engineering, Purdue University, West Lafayette, IN 47907
Sato H
Affiliation:
School of Materials Engineering, Purdue University, West Lafayette, IN 47907
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Abstract

A new type of twin structure is found to exist quite commonly in the Bi2Sr2CaCu2O8+δ superconductor obtained by annealing melt quenched amorphous precursors. From transmission electron microscopy and electron diffraction, the twinning plane is determined to be the (015) plane (disregarding the period of incommensurate modulation in the b-direction). Further, the twin boundary is found to be coherent with a specific coincidence condition. The analysis of the morphologies indicates that the twins nucleate at the early stages of the grain growth in these materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 238: Symposium Cb – Structure and Properties of Interfaces in Materials , 1991 , 841
Copyright
Copyright © Materials Research Society 1992

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References

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