中国物理B ›› 2004, Vol. 13 ›› Issue (8): 1348-1352.doi: 10.1088/1009-1963/13/8/030

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Magnetic properties of composites of Tb0.28Dy0.72Fe2 and polyvinylidene fluoride

蔡宁, 翟俊宜, 施展, 林元华, 南策文   

  1. State Key Laboratory of New Ceramics and Fine Processing, and Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
  • 收稿日期:2003-11-03 修回日期:2004-03-30 出版日期:2004-06-21 发布日期:2004-08-20
  • 基金资助:
    Project supported by the National Science Foundation of China (Grant Nos 50232030 and 50172026) and Ministry of Sciences and Technology of China Through 973-Project (Grant No 2002CB613303).

Magnetic properties of composites of Tb0.28Dy0.72Fe2 and polyvinylidene fluoride

Cai Ning (蔡宁), Zhai Jun-Yi (翟俊宜), Shi Zhan (施展), Lin Yuan-Hua (林元华), Nan Ce-Wen (南策文)   

  1. State Key Laboratory of New Ceramics and Fine Processing, and Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
  • Received:2003-11-03 Revised:2004-03-30 Online:2004-06-21 Published:2004-08-20
  • Supported by:
    Project supported by the National Science Foundation of China (Grant Nos 50232030 and 50172026) and Ministry of Sciences and Technology of China Through 973-Project (Grant No 2002CB613303).

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摘要： Bi-ferroic particulate composites with Tb_{0.28}Dy_{0.72}Fe_2 (Terfenol-D) particles randomly dispersed in ferroelectric polyvinylidene fluoride matrix prepared by a simple hot-pressing procedure were investigated. With increasing concentration of Terfenol-D, the magnetic susceptibility, saturation magnetization and initial permeability of the composites increases. The dependence of the effective magnetostriction on applied bias for the composites is similar to that for bulk Terfenol-D, but the effective magnetostriction strongly depends on the volume fraction of Terfenol-D. The observed behaviour of the composite is reasonably described by using effective medium theories.

关键词: magnetostriction, Terfenol-D, composites, effective medium theories

Abstract: Bi-ferroic particulate composites with Tb$_{0.28}$Dy$_{0.72}$Fe$_2$ (Terfenol-D) particles randomly dispersed in ferroelectric polyvinylidene fluoride matrix prepared by a simple hot-pressing procedure were investigated. With increasing concentration of Terfenol-D, the magnetic susceptibility, saturation magnetization and initial permeability of the composites increases. The dependence of the effective magnetostriction on applied bias for the composites is similar to that for bulk Terfenol-D, but the effective magnetostriction strongly depends on the volume fraction of Terfenol-D. The observed behaviour of the composite is reasonably described by using effective medium theories.

Key words: magnetostriction, Terfenol-D, composites, effective medium theories

中图分类号:  (Magnetomechanical effects, magnetostriction)

  • 75.80.+q
75.30.Cr (Saturation moments and magnetic susceptibilities) 75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects) 81.20.Ev (Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation)