Temperature dependence of the elastic and inelastic moduli of YBa{sub}2Cu{sub}3O{sub}(7-δ) ceramics

摘要

Elastic and inelastic moduli of the superconducting yttrium-barium oxide ceramics YBa{sub}2Cu{sub}3O{sub}7 (YBCO) were studied using the ultrasonic resonance technique. In the range from room temperature up to the temperature of the orth-tetra phase transition, the elastic and inelastic moduli of YBCO samples exhibit a number of anomalies. It is shown that these features are related to the behavior of active oxygen in the ceramics, the phase inhomogeneity of the material, and the phase transitions.