Pinched P-E hysteresis loops in Ba4Sm2Fe0.5Ti3Nb6.5O30 ceramic with tungsten bronze structure

被引：6
|
作者：
Li, Cheng [1 ,2 ]
Hong, Jiang Sheng [1 ,2 ]
Huang, Yu Hui [1 ,2 ]
Ma, Xiao [3 ]
Fu, Mao Sen [3 ]
Li, Juan [4 ]
Liu, Xiao Qiang [1 ]
Wu, Yong Jun [1 ,2 ]
机构：
[1] Zhejiang Univ, Sch Mat Sci & Engn, Lab Dielect Mat, Hangzhou 310027, Zhejiang, Peoples R China
[2] Zhejiang Univ, Innovat Ctr Minimally Invas Tech & Device, Cyrus Tang Ctr Sensor Mat & Applicat, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China
[3] Northwestern Polytech Univ, Sch Mat Sci & Engn, Xian 710072, Shaanxi, Peoples R China
[4] Zhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310006, Zhejiang, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2019年 / 115卷 / 08期
基金：
美国国家科学基金会; 国家重点研发计划;
关键词：
Niobium compounds - Tungsten - Titanium compounds - Electric fields - X ray diffraction - Ceramic materials - Barium compounds - Electron diffraction - Bronze;
D O I：
10.1063/1.5111360
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In the present work, single-phase Ba4Sm2Fe0.5Ti3Nb6.5O30 ceramics with a tetragonal tungsten bronze structure (TTB) were synthesized. Pinched polarization-electric field (P-E) hysteresis loops are observed below the Curie temperature (T-c) in the as-synthesized ceramics. The origin of the loops was thoroughly studied using in situ TEM and XRD. The in situ selected area electron diffraction (SAED) patterns showed that the pinched loops originated from the coexistence of polar commensurate and nonpolar incommensurate superlattice reflections. In situ XRD results revealed increasing tetragonality with rising temperature, implying that the enhancement in octahedral tilting was closely related to the commensurate-incommensurate structural modulation.
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页数：5
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