J. Bornarel et R. Cach, PHASE FRONT SHAPES IN THE KD2PO4 PARAELECTRIC-FERROELECTRIC TRANSITION, Journal of physics. Condensed matter, 5(18), 1993, pp. 2977-2986
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.