C. Hucho et al., COEXISTENCE OF HIGH-T(C) SUPERCONDUCTIVITY AND FERROELECTRICITY ANTIFERROELECTRICITY, Physica. B, Condensed matter, 194, 1994, pp. 2111-2112
We report on ultrasonic measurements on polycrystalline samples of the
high-T(c) system YBa2Cu3O7-delta (YBCO). It is shown that the influen
ce of the dielectric anomalies above T(c) on the elastic properties de
pends sensitively on boundary conditions as eg. grainsize and intergra
nular electrical conductivity.