Re-entrant dipole glass-like behavior and lattice dynamics of 0.65Bi(Mg1/2Ti1/2)O3-0.35PbTiO3
Re-entrant dipole glass-like behavior and lattice dynamics of 0.65Bi(Mg1/2Ti1/2)O3-0.35PbTiO3
复制标题
0.65Bi(Mg1/2Ti1/2)O3-0.35PbTiO3的重入偶极子玻璃行为和晶格动力学
DOI：
10.1111/jace.16956
复制
发表时间：
2019
影响因子：
3.9
通讯作者：
Laijun Liu
中科院分区：
文献类型：
--
作者：
Kaiyuan Chen;Fu Wei;Liu Jia;Yan Tianxiang;Zhencheng Lan;Liang Fang;Biaolin Peng;Dawei Wang;Laijun Liu
制备了位于四方和三方之间的准同型相界（MPB）附近的0.65Bi（Mg 1/2 Ti 1/2）O3 - 0.35PbTiO3（0.65BMT-0.35PT）陶瓷。介电常数对温度的依赖性在室温附近表现出重入偶极玻璃样行为。该行为由Vogel-Fulcher定律和新玻璃模型描述。此外，一个唯象统计模型被用来确定团簇分布的温度依赖性。0.65 BMT-0.35 PT陶瓷的晶格动力学通过拉曼光谱从298 - 723 K估算。揭示了铁电长程有序的破坏和局部晶格畸变的发生。0.65BMT-0.35PT的驰豫铁电（r-FE）性质通过极化电场P（E）来表征。团簇的分布与铁电性能之间有着密切的关系。
The 0.65Bi(Mg1/2Ti1/2)O3‐0.35PbTiO3(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 thenew 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 fieldP(E). A close relation between the distribution of clusters and ferroelectric properties was established.