Negative thermal expansion of HTSC-type structures: low temperature structure measurements on Eu 1+x ( Ba 1−y R y ) 2−x Cu 3 O 7−d compounds and theoretical treatment

Negative thermal expansion of HTSC-type structures: low temperature structure measurements on Eu 1+x ( Ba 1−y R y ) 2−x Cu 3 O 7−d compounds and theoretical treatment

The temperature dependences of the lattice parameters are investigated on the perovskite-like structures Eu 1+x ( Ba 1−y R y ) 2−x Cu 3 O 7−d with Ba substitution by light rare earth, using x-ray diffraction techniques. A negative thermal expansion effect is observed and explained in detail.

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Veröffentlicht in:Low temperature physics (Woodbury, N.Y.) N.Y.), 2005-03, Vol.31 (3), p.263-267
Hauptverfasser: Eremenko, V. V., Feodosyev, S. B., Gospodarev, I. A., Sirenko, V. A., Shvedun, M. Yu, McCallum, W., Tovar, M.
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Sprache:eng
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Zusammenfassung:The temperature dependences of the lattice parameters are investigated on the perovskite-like structures Eu 1+x ( Ba 1−y R y ) 2−x Cu 3 O 7−d with Ba substitution by light rare earth, using x-ray diffraction techniques. A negative thermal expansion effect is observed and explained in detail.
ISSN:1063-777X
1090-6517
DOI:10.1063/1.1884428