Effect of local structural distortion on magnetic and dielectric properties in BiFeO3 with Ba, Ti co-doping

被引：17

作者：

Cheng, G. F. ^{[1
]}

Ruan, Y. J. ^{[1
]}

Liu, W. ^{[1
]}

Wu, X. S. ^{[2
,3
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, Anal & Testing Ctr Inorgan Mat, Shanghai 200050, Peoples R China

[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[3] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2015年 / 468卷

基金：

中国国家自然科学基金;

关键词：

Structural distortion; Charge compensation; Vibration space; Bi1-xBaxFe1-xTixO3 (x <= 0.25) ceramics; BEHAVIOR; PR;

D O I：

10.1016/j.physb.2015.04.023

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The structural, magnetic, and dielectric properties of Bi1-xBaxFe1-xTixO3 (x <= 0.25) ceramics are studied systematically. The symmetry of the unit cell for BiFeO3 co-doping with Ba and Ti remains the space group of R3c. The addition of Ba and Ti increases the unit cell volume without changing the unit cell symmetry. The remnant magnetization decreases monotonically with increasing the doping content, which may originate from contraction in Fe-O-Fe bond and FeO6 octahedron. Charge compensation occurs in BiFeO3 with Ba and Ti co-doping, which may suppress the charge defects and decrease the magnetism. The substitution of Fe with smaller radial Ti ion supplies larger vibration space in FeO6 octahedron, which may enhance the dielectric constant and decrease the dielectric loss significantly. (C) 2015 Elsevier B.V. All rights reserved

引用

页码：81 / 84

页数：4

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