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

Autor:	Chigvinadze, J. G., Serdobintsev, V. I., Tavkhelidze, V. M.
Zdroj:	Physica Status Solidi (A) - Applications and Materials Science; May 2004, Vol. 201 Issue: 7 p1471-1476, 6p
Abstrakt:	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)
Databáze:	Supplemental Index
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