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Structural and Magnetic Properties of Untwinned Yba2Cu3O6+x Single Crystals

Published online by Cambridge University Press:  28 February 2011

Debra L. Kaiser ,
Frank W. Gayle ,
Lydon J. Swartzendruber ,
Winnie Wong-Ng ,
Steven F. Watkins  and
Frank R. Fronczek
Debra L. Kaiser
Affiliation:
National Institute of Standards and Technology, Materials Science and Engineering Laboratory, Gaithersburg, MD 20899
Frank W. Gayle
Affiliation:
National Institute of Standards and Technology, Materials Science and Engineering Laboratory, Gaithersburg, MD 20899
Lydon J. Swartzendruber
Affiliation:
National Institute of Standards and Technology, Materials Science and Engineering Laboratory, Gaithersburg, MD 20899
Winnie Wong-Ng
Affiliation:
National Institute of Standards and Technology, Materials Science and Engineering Laboratory, Gaithersburg, MD 20899
Steven F. Watkins
Affiliation:
Louisiana State University, Dept. of Chemistry, Baton Rouge, LA 70803
Frank R. Fronczek
Affiliation:
Louisiana State University, Dept. of Chemistry, Baton Rouge, LA 70803
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Abstract

We have conducted structural and magnetic investigations on thermomechanically-detwinned YBa2Cu3O6+x single crystals. Single crystal x-ray diffraction studies on a fully untwinned crystal with a superconducting onset temperature of 54 K have revealed that oxygen atoms in the basal plane are offset from the crystallographic mirror plane in the a direction, leading to “zig-zag” Cu-O chains. Magnetic measurements on untwinned and twinned crystals at 77 K indicate low levels of flux pinning in both crystals, with a slightly larger amount of pinning in the twinned crystal.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 793
Copyright
Copyright © Materials Research Society 1990

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References

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