Premium
Electrostrictive and Dielectric Response in Lead Magnesium Niobate–Lead Titanate (0.9PMN · 0.1PT) and Lead Lanthanum Zirconate Titanate (PLZT 9.5/65/35) under Variation of Temperature and Electric Field
Author(s) -
Zhang Qiming,
Pan Wuyi,
Bhalla Amar,
Cross Leslie E.
Publication year - 1989
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1989.tb06181.x
Subject(s) - electrostriction , curie temperature , materials science , dielectric , ferroelectricity , titanate , condensed matter physics , lead titanate , lead zirconate titanate , electric field , polarization (electrochemistry) , lanthanum , mineralogy , piezoelectricity , composite material , ceramic , physics , optoelectronics , ferromagnetism , chemistry , inorganic chemistry , quantum mechanics
In situ measurements of electrostrictive strain and effective dielectric constant for two ferroelectric relaxor materials, lead magnesium niobate–lead titanate (0.9PMN · 0.1PT) and lead lanthanum zirconate titanate (PLZT 9.5/65/35), were performed in the temperature ranges near their respective mean Curie points under the variation of applied electric field. The measurement results show that the polarization‐related electrostrictive coefficients Q ij are not constant under variation of temperature and electric field. The observed anomaly in Q ij indicates the dynamic behavior of the existing micropolar domains and its coupling to local defect structure. The data also support the idea that at temperatures far above the mean Curie point, there is still a substantial amount of micropolar domain and the response of the relaxor materials at the experimental temperature range is from the combined contributions due to induced polarization and micropolar domain flipping.