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Re‐entrant dipole glass‐like behavior and lattice dynamics of 0.65Bi(Mg 1/2 Ti 1/2 )O 3 ‐0.35PbTiO 3
Author(s) -
Chen Kaiyuan,
Wei Fu,
Jia Liu,
Tianxiang Yan,
Lan Zhencheng,
Fang Liang,
Peng Biaolin,
Wang Dawei,
Liu Laijun
Publication year - 2020
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/jace.16956
Subject(s) - materials science , ferroelectricity , phase boundary , raman spectroscopy , condensed matter physics , tetragonal crystal system , dielectric , permittivity , dipole , lattice (music) , ceramic , polarization (electrochemistry) , phase transition , phase (matter) , crystal structure , optics , crystallography , chemistry , physics , composite material , optoelectronics , organic chemistry , acoustics
The 0.65Bi(Mg 1/2 Ti 1/2 )O 3 ‐0.35PbTiO 3 (0.65BMT‐0.35PT) ceramic, nearby morphotropic phase boundary (MPB), between tetragonal and rhombohedral was prepared. Dielectric permittivity dependence of temperature exhibits a re‐entrance dipole glass‐like behavior near room temperature. The behavior was described by the Vogel‐Fulcher law and the new glass model . Furthermore, a phenomenological statistical model was employed to determine the distribution of clusters dependence of temperature. The lattice dynamics of the 0.65BMT‐0.35PT ceramic was estimated by Raman spectroscopy from 298‐723 K. A disruption of ferroelectric long‐range order and an occurrence of local lattice distortion were revealed. The relaxor‐ferroelectric (r‐FE) nature of the 0.65BMT‐0.35PT was characterized by polarization‐electric field P(E) . A close relation between the distribution of clusters and ferroelectric properties was established.