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MEASUREMENT OF OXYGEN DISORDER AND
NANO-TWIN MICROSTRUCTURE ASSOCIATED WITH
COLUMNAR DEFECTS IN YBCO*
Y. Yana, T. Waltherb, and M. A. Kirka
'Materials Science Division
Argonne National Laboratory
9700 S. Cass Ave.
Argonne, IL 60439

bInstitut fuer Anorganische Materialforschung
Universitaet Bonn
Roemerstr. 164, 53117 Bonn
Germany

November 1998
'ne submite manuscrip na:
been created by the University, a
Chicago as Operator of Argonni
National Laboratory ('Argonnb 1
under Contract No. W-1-1 09
ENG-38 with the U.S. Department
If Energy. The U.S. Govemmerr
retains for itself, and other
acting on its behalf, a paid-up,
non exclusive, irrevocablc
worldwide license in said article
to reproduce, prepare derivative
works, distribute copies to the
public, and perform publicly and
dislaypulicyby or on behalf
Df the Government.

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Submitted to the Materials Research Society, November 30 - December 4, 1998,
Boston, MA.
*Work supported by the U. S. Department of Energy, Office of Basic Energy Sciences, under
Contract W-31-109-Eng-38 at Argonne National Laboratory.