J. Bornarel et al., PHASE FRONT SHAPES AND THERMAL DISTRIBUTIONS FOR KD2PO4 SAMPLES IN A ROTATING THERMAL-GRADIENT, Journal of physics. Condensed matter, 8(39), 1996, pp. 7365-7377
The shape of the DKDP phase front is observed along three perpendicula
r directions during the coexistence of the paraelectric and ferroelect
ric phases for different orientations of an external thermal gradient
G(e). Quasi-planar and zigzag shapes are then described. The thermal d
istribution inside the sample can be well represented by a thermal gra
dient G(i) in the middle of a non-plate-shaped sample. The important e
ffect of the sample's corners is also demonstrated.