Effect of thermal cycling upon the nature of acoustic anomalies near the phase transition at Ts ≈ 235 K in Er-Ba-Cu-O

Low‐frequency acoustic (∼103 Hz) investigations of the ErBa2Cu3O7−δ system have been carried out over the temperature range 80–290 K. The acoustic anomalies appropriate to a second‐order phase transition are found at Ts ≈ 235 K. It is shown that hysteresis in the temperature dependence of the elasti...

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Bibliographic Details
Published in:Physica status solidi. A, Applied research Applied research, 2004-05, Vol.201 (7), p.1471-1476
Main Authors: Chigvinadze, J. G., Serdobintsev, V. I., Tavkhelidze, V. M.
Format: Article
Language:English
Subjects:
62.40.+i
64.70.Kb
74.72.Bk
Acoustical properties of solids
Condensed matter: structure, mechanical and thermal properties
Elasticity, elastic constants
Exact sciences and technology
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Physics
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Summary:Low‐frequency acoustic (∼103 Hz) investigations of the ErBa2Cu3O7−δ system have been carried out over the temperature range 80–290 K. The acoustic anomalies appropriate to a second‐order phase transition are found at Ts ≈ 235 K. It is shown that hysteresis in the temperature dependence of the elastic modulus and the change in nature of acoustic anomalies during thermal cycling are related to the effect of order parameter phase fixation by structural imperfections. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:0031-8965
1521-396X
DOI:10.1002/pssa.200306797