中国物理B ›› 2008, Vol. 17 ›› Issue (12): 4652-4655.doi: 10.1088/1674-1056/17/12/054

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The magnetic and dielectric properties of multiferroic Sr- substituted Zn2-Y hexagonal ferrites

徐芳, 白洋, 艾芬, 乔利杰   

  1. Corrosion and Protection Center, Key Laboratory of Environmental Fracture (Ministry of Education), University of Science and Technology Beijing, Beijing 100083, China
  • 收稿日期:2008-02-20 修回日期:2008-07-20 出版日期:2008-12-20 发布日期:2008-12-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 50702005 ), the Specialized Research Fund for the Doctoral Program of Higher Education (Grant No 20070008027), and the Beijing Municipal Commission of Education (Grant No SYS1

The magnetic and dielectric properties of multiferroic Sr- substituted Zn2-Y hexagonal ferrites

Xu Fang (徐芳), Bai Yang (白洋), Ai Fen (艾芬), Qiao Li-Jie (乔利杰)   

  1. Corrosion and Protection Center, Key Laboratory of Environmental Fracture (Ministry of Education), University of Science and Technology Beijing, Beijing 100083, China
  • Received:2008-02-20 Revised:2008-07-20 Online:2008-12-20 Published:2008-12-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 50702005 ), the Specialized Research Fund for the Doctoral Program of Higher Education (Grant No 20070008027), and the Beijing Municipal Commission of Education (Grant No SYS1

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摘要： The magnetic and dielectric properties of Sr-substituted Zn2-Y hexagonal ferrites (Ba2-xSrxZn2Fe12O22, 1.0≤x≤1.5) are studied in this paper. Sr substitution will lead to the variation of cation occupation, which influences both the magnetic and electric properties. As Sr content x rises from 1.0 to 1.5, magnetic hysteresis loop gets wider gradually and the permeability drops rapidly due to the transformation from ferrimagnetic to antiferromagnetic phase. Moreover, permittivity rises with increasing Sr content. Under a certain external magnetic field, the phase transition of helical spin structure of Ba0.5Sr1.5Zn2Fe12O22 at about 295K seems to open a possibility for the room-temperature ferroelectricity induced by magnetic field. But its low resistivity prevents the observation of ferroelectric and magnetoelectric properties at room-temperature.

关键词: hexagonal ferrite, Sr substitution, multiferroic, polycrystal

Abstract: The magnetic and dielectric properties of Sr-substituted Zn2-Y hexagonal ferrites (Ba2-xSrxZn2Fe12O22, 1.0≤x≤1.5) are studied in this paper. Sr substitution will lead to the variation of cation occupation, which influences both the magnetic and electric properties. As Sr content x rises from 1.0 to 1.5, magnetic hysteresis loop gets wider gradually and the permeability drops rapidly due to the transformation from ferrimagnetic to antiferromagnetic phase. Moreover, permittivity rises with increasing Sr content. Under a certain external magnetic field, the phase transition of helical spin structure of Ba0.5Sr1.5Zn2Fe12O22 at about 295K seems to open a possibility for the room-temperature ferroelectricity induced by magnetic field. But its low resistivity prevents the observation of ferroelectric and magnetoelectric properties at room-temperature.

Key words: hexagonal ferrite, Sr substitution, multiferroic, polycrystal

中图分类号:  (Magnetization curves, hysteresis, Barkhausen and related effects)

  • 75.60.Ej
75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)) 75.50.Gg (Ferrimagnetics) 77.22.Ch (Permittivity (dielectric function)) 77.80.-e (Ferroelectricity and antiferroelectricity)