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

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 d...

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Bibliographic Details
Published in:Applied physics letters 1988-10, Vol.53 (16), p.1560-1562
Main Authors: STAINES, M. P, TALLON, J. L, ROBINSON, W. H, FLOWER, N. E
Format: Article
Language:English
Subjects:
Anelasticity, internal friction, stress relaxation, and mechanical resonances
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Mechanical and acoustical properties of condensed matter
Physics
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Summary: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.100438