Polarization responses in lead magnesium niobate based relaxor ferroelectrics
- Materials Research Laboratory and Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 (United States)
Changes in the electrostrictive coefficients Q{sub ij}, especially the volumetric coefficient, with temperature and bias field provides important information regarding the nature of the polarization in lead magnesium niobate based relaxor ferroelectrics. We show that the polarization response at temperatures near the dielectric constant maximum is mainly through the polar-vector reorientation of the nanopolar regions, as suggested by the polar glass model. As the temperature is lowered through the freezing transition, the polarization response is governed by the phase switching and intrinsic contributions rather than by the domain wall motions found in normal ferroelectrics. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 542512
- Journal Information:
- Applied Physics Letters, Vol. 71, Issue 12; Other Information: PBD: Sep 1997
- Country of Publication:
- United States
- Language:
- English
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