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VOLUME 49 (1989) | ISSUE 2 | PAGE 102
Ferroelectric anomalies and superconductivity in metal oxide compounds
The ferroelectric anomalies in systems YBa2Cu306+JC (0<jc< 1) and La2_xSrxCu04 (0<x<0.4), which we have observed previously at frequencies of ~ 1 GHz, are studied. A correlation between the broadening of superconducting transitions and the microwave field resonance absorption frequencies observed by us is discussed.