Abstract
The bias field-temperature, E-T, phase diagram for 0.87PbMg 1/3 Nb 2/3 O 3 -0.13PbTiO 3 crystals has been obtained by using two different techniques, dielectric spectroscopy and elastic compliance. The temperature dependence of both the dielectric permittivity and elastic compliance provide a step corresponding to the phase boundary between the relaxor and ferroelectric phases. In comparison with the phase diagram of pure PbMg 1/3 Nb 2/3 O 3 , the result obtained shows an additional, nearly vertical line, which lies close to the Vogel-Fulcher temperature.
Keywords:
Acknowledgments
This study is partially supported by RFBR (grants 04-02-16103, 05-02-16399, 05-02-90568 NNS and 05-03-32214) and 1QS100100563 AV CR. I. P. R. appreciates a financial support from a Scientific Research Fellowship and hospitality of Laboratoire de Physique de la Mati'ere Condens'ee, Université de Picardie Jules Verne. I.P.R. and S.A.P. are grateful to Vitaliy Topolov, Vladimir Shvartsman, Pavel Timonin and Vladimir Sakhnenko for discussions.
Paper originally presented at IMF-11, Iguassu Falls, Brazil, September 5–9, 2005