PHASE FRONT SHAPES IN THE KD2PO4 PARAELECTRIC-FERROELECTRIC TRANSITION

The competition between the elastic energy and the electrostatic energ y induces particular shapes of the phase front at the KD2PO4 first-ord er transition. The coexistence of the two phases is reported for a par aelectric-ferroelectric transition; the relevant domain textures and d ielectric properties are described. It is shown that the tilt angle be tween the phase front and the (001) plane never exceeds 22-degrees in our experiments.