Temperature-Dependent EXAFS Spectra of YBa 2 Cu 3 O 7-δ

We present EXAFS data on YBa 2 Cu 3 O 7-δ taken at four temperatures: 80 K, 112 K, 170 K, and 297 K. Spectra from both the Y edge and Cu edge are analyzed for the mean distances to near neighbors and the mean square relative displacements, σ 2 . The distances show small temperature dependences. The...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1987-01, Vol.26 (S3-2), p.1051
Main Authors: Gygax, S., Crozier, E. D., Alberding, N., Bauchspieß, K. R., Seary, A. J.
Format: Article
Language:English
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Summary:We present EXAFS data on YBa 2 Cu 3 O 7-δ taken at four temperatures: 80 K, 112 K, 170 K, and 297 K. Spectra from both the Y edge and Cu edge are analyzed for the mean distances to near neighbors and the mean square relative displacements, σ 2 . The distances show small temperature dependences. The σ 2 's are unusal, decreasing more strongly at low temperature (112 K to 80 K) than at high temperature (300 K to 170 K). This could indicate some softening of the bond strengths and may indicate a phase transition.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAPS.26S3.1051