PHASE COEXISTENCE IN DKDP WITH A THERMAL-GRADIENT PARALLEL TO THE FERROELECTRIC AXIS

The coexistence of the paraelectric and ferroelectric phases is repone d for thermally gradiented samples of DKDP; the shape of the phase fro nt, the relevant domain textures and the dielectric properties are des cribed. A phenomenological model allows us to evaluate the contributio n of the domains to the dielectric constant.