Title :
The Multiferroic Properties of BiFeO3–Na0.5Bi0.5TiO3 Solid Solution Ceramics
Author :
Zhenyu Xu ; Lirong Luo ; Maocheng He ; Kai Shen ; Jun Du ; Qingyu Xu
Author_Institution :
Dept. of Phys., Southeast Univ., Nanjing, China
Abstract :
Solid solutions of 80% BiFeO3 and 20% Na0.5Bi0.5TiO3 (BFO-NBT), and 80% Bi0.95La0.05FeO3 and 20% NBT (BLFO-NBT) were prepared by the conventional sol-gel method. Clear ferromagnetic hysteresis loops were observed for both samples. The poling electric field strongly suppressed the magnetization of BFO-NBT, while showing negligible influence on that of BLFO-NBT. The reorientation of magnetization by the poling field has been excluded. The strongly suppressed magnetization in poled BFO-NBT was attributed to the decreased concentration of defect configurations due to the redistribution of oxygen vacancies under electric field, which was weakened by 5% La substitution.
Keywords :
bismuth compounds; ceramics; dielectric polarisation; ferromagnetic materials; magnetic hysteresis; magnetisation; multiferroics; sodium compounds; sol-gel processing; solid solutions; vacancies (crystal); BiFeO3-Na0.5Bi0.5TiO3; conventional sol-gel method; defect configuration; ferromagnetic hysteresis loops; multiferroic properties; oxygen vacancy redistribution; poling electric field; poling field; solid solution ceramics; strongly suppressed magnetization; Electric fields; Magnetic hysteresis; Magnetic properties; Magnetization; Magnetoelectric effects; Solids; Temperature measurement; BiFeO3; BiFeO3 (BFO); Multiferroic; ferromagnetism; magnetoelectric (ME) coupling; magnetoelectric coupling; multiferroic;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2015.2438954
