Room temperature multiferroic properties of Fe-doped nonstoichiometric SrTiO3 ceramics at both A and B sites

被引：14
作者：
Wang, Xiaofei [1 ]
Wang, Zhaowu [1 ,3 ]
Hu, Qiubo [2 ,3 ]
Zhang, Chao [1 ]
Wang, Dandan [1 ]
Li, Liben [1 ]
机构：
[1] Henan Univ Sci & Technol, Sch Phys & Engn, Henan Key Lab Photoelect Energy Storage Mat & App, Luoyang 471023, Peoples R China
[2] Luoyang Inst Sci & Technol, Dept Math & Sci, Luoyang 471023, Peoples R China
[3] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
来源：
SOLID STATE COMMUNICATIONS | 2019年 / 289卷
基金：
美国国家科学基金会; 中国国家自然科学基金;
关键词：
Perovskite; Ferroelectricity; Ferromagnetism; solid-state reactions; MAGNETISM; OXIDES;
D O I：
10.1016/j.ssc.2018.12.001
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
This letter reports the structural, dielectric, ferroelectric, and magnetic properties of Fe substituted nonstoichiometric STO ceramics. X-ray diffraction and Scanning electron microscope reveal the microstructure of the samples. The room temperature multiferroicity of the Fe-doped Ti-rich STO ceramics is successfully realized by M-H hysteresis loop, P-E hysteresis loop and magnetodielectric measurement. The origins of ferroelectricity may be related to the lattice distortions and antisite-like defects with net local dipoles. The ferromagnetism are mainly contributed by the competitions among the double exchange interactions, super-exchange interactions and the non-linear ferromagnetic exchange coupling. In addition, the ordered spin arrangement of the ferromagnetism is formed by the exchange interaction of Fe atom using first principle simulations.
引用
收藏
页码：22 / 26
页数：5
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