中国物理B ›› 2021, Vol. 30 ›› Issue (10): 107701-107701.doi: 10.1088/1674-1056/ac1b92

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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. 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
  • 收稿日期:2021-07-02 修回日期:2021-07-31 接受日期:2021-08-07 出版日期:2021-09-17 发布日期:2021-09-17
  • 通讯作者: Hui Sun E-mail:hsun@yzu.edu.cn

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. 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
  • Received:2021-07-02 Revised:2021-07-31 Accepted:2021-08-07 Online:2021-09-17 Published:2021-09-17
  • Contact: Hui Sun E-mail:hsun@yzu.edu.cn

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摘要： 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.

关键词: layer-perovskited oxides, ferroelectricity, weak ferromagnetism, phase transition

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.

Key words: layer-perovskited oxides, ferroelectricity, weak ferromagnetism, phase transition

中图分类号:  (Ferroelectricity and antiferroelectricity)

  • 77.80.-e
77.80.B- (Phase transitions and Curie point) 91.60.Pn (Magnetic and electrical properties) 75.47.Lx (Magnetic oxides)