Temperature-Dependent EXAFS Spectra of YBa sub 2 Cu sub 3 O sub 7-- delta . (Retroactive Coverage)

EXAFS data on YBa sub 2 Cu sub 3 O sub 7-- delta have been taken at four temperatures: 80, 112, 170, and 297K. Spectra from both the yttrium edge and Cu edge are analyzed for the mean distance to near neighbors and the mean square relative displacements, sigma exp 2 . The distances show small temper...

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Bibliographic Details
Published in:Jpn. J. Appl. Phys. 1 1987-08, Vol.26, p.1051-1052
Main Authors: Gygax, S, Crozier, E D, Alberding, N, Bauchspiess, K R, Seary, A J
Format: Article
Language:English
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Summary:EXAFS data on YBa sub 2 Cu sub 3 O sub 7-- delta have been taken at four temperatures: 80, 112, 170, and 297K. Spectra from both the yttrium edge and Cu edge are analyzed for the mean distance to near neighbors and the mean square relative displacements, sigma exp 2 . The distances show small temperature dependences. The sigma exp 2 s are unusual, decreasing more strongly at low temperature (112-80K) than at high temperature (300-170K). This could indicate some softening of the bond strengths and may indicate a phase transition. Spectra, Graphs. 9 ref.--AA
ISSN:0021-4922