Effects of Ni substitution on multiferroic properties in Bi5FeTi3O15 ceramics
Hui Sun(孙慧)1,3,†, Jiaying Niu(钮佳颖)1, Haiying Cheng(成海英)2, Yuxi Lu(卢玉溪)1, Zirou Xu(徐紫柔)1, Lei Zhang(张磊)1, and Xiaobing Chen(陈小兵)1
1 College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China; 2 School of Sino-German Engineering, Shanghai Technical Institute of Electronics&Information, Shanghai 201411, China; 3 National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
Abstract The single-phase multiferroic Bi5Fe1-xNixTi3O15 (BFNT-x, x=0, 0.1, 0.2, 0.3, 0.4, and 0.5) ceramics were synthesized by a sol-gel auto-combustion method, and their microstructures, ferroelectric, magnetic, and dielectric properties were investigated in detail. All samples belong to layer-perovskited Aurivillius phase containing four perovskite units sandwiched between two Bi-O layers. Ni substitution can not only improve ferroelectricity but also enhance the magnetic properties. The BFNT-0.2 sample shows the largest remnant polarization (2Pr ～ 11.6 μC/cm2) and the highest remnant magnetization (2Mr ～ 0.244 emu/g). The enhancement of the magnetic properties may mainly originate from the spin canting of Fe/Ni-O octahedra via Dzyaloshinskii-Moriya (DM) interaction. In order to explore the influence of valance state of magnetic ions on the properties, the x-ray photoelectron spectroscopy was carried out. Furthermore, structural, ferroelectric, and magnetic transitions were also investigated.
Corresponding Authors:
Hui Sun
E-mail: hsun@yzu.edu.cn
Cite this article:
Hui Sun(孙慧), Jiaying Niu(钮佳颖), Haiying Cheng(成海英), Yuxi Lu(卢玉溪), Zirou Xu(徐紫柔), Lei Zhang(张磊), and Xiaobing Chen(陈小兵) Effects of Ni substitution on multiferroic properties in Bi5FeTi3O15 ceramics 2021 Chin. Phys. B 30 107701
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