TITLE

Atmosphere-sensitive 225 K feature in internal friction of YBa2Cu3O7-δ

AUTHOR(S)
Staines, M. P.; Tallon, J. L.; Robinson, W. H.; Flower, N. E.
PUB. DATE
October 1988
SOURCE
Applied Physics Letters;10/17/1988, Vol. 53 Issue 16, p1560
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The Young’s modulus and internal friction of YBa2 Cu3 O7-δ were measured from 280 to 80 K at 40 kHz using an ultrasonic composite oscillator technique. Three internal friction peaks intrinsic to the polycrystalline material which were observed at 105, 125, and 225 K disappeared when the sample was deoxygenated. Other structure in the internal friction between 220 and 280 K is ascribed to water vapor. The 225 K peak is reversibly eliminated on exposure to moist air. This is suggestive of internal friction at crystal surfaces or grain boundaries.
ACCESSION #
9828446

 

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