D. Viehland et al., Importance of random fields on the properties and ferroelectric phase stability of < 001 > oriented 0.7 Pb(Mg1/3Nb2/3)O-3-0.3 PbTiO3 crystals, APPL PHYS L, 78(22), 2001, pp. 3508-3510
Temperature dependent dielectric constant measurements have been performed
on < 001 > oriented 0.7 Pb(Mg1/3Nb2/3)O-3-0.3 PbTiO3 crystals. These invest
igations have revealed an irreversible secondary transformation between a n
ormal ferroelectric state and a relaxor ferroelectric state with increasing
temperature. The results demonstrate that the anisotropy of the high perfo
rmance piezocrystal state is only metastably locked in under application of
field. Clearly, local random fields play a crucial role upon the ferroelec
tric phase stability and properties of < 001 > oriented piezocrystals. (C)
2001 American Institute of Physics.