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Measurement of Oxygen Disorder and Nano-Twin Microstructure Associated with Columnar Defects In Ybco

Published online by Cambridge University Press:  15 February 2011

Y. Yan ,
T. Walther  and
M.A. Kirk
Y. Yan
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
T. Walther
Affiliation:
Institut fuer Anorganische Materialforschung, Universitaet Bonn, Roemerstr. 164, 53117 Bonn, Germany
M.A. Kirk
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
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Abstract

Studies of defects generated by high energy (>1 GeV) heavy ion irradiation in high-Tc superconductors have been performed by transmission electron microscopy (TEM). Our study shows that high dose irradiation leads to the formation of nano-twins, by which the columnar defects are connected. An analysis of the local Fourier components of the image intensity in [001] lattice images indicates that these new "twin" boundaries are much more diffuse than preexisting twin boundaries in YBCO. The mechanism of the formation of nano-twin boundaries on {110} planes and their possible relation to superconducting properties are discussed.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 540: Symposium N / Microstructural Processes in Irradiated Materials , 1998 , 267
Copyright
Copyright © Materials Research Society 1999

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