中国物理B ›› 2000, Vol. 9 ›› Issue (9): 685-688.doi: 10.1088/1009-1963/9/9/010

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STRUCTURE AND M?SSBAUER STUDY OF NANOCRYSTALLINE Ni-Zn FERRITE

王丽, 李发伸, 周庆国   

  1. Department of Physics, Lanzhou University, Lanzhou 730000, China; Applied Magnetics Key Laboratory of the Ministry of Education, Lanzhou 730000, China
  • 收稿日期:2000-01-03 出版日期:2000-09-15 发布日期:2005-06-10
  • 基金资助:
    Project supported by the Cooperative Projects between China and France of the Ministry of Education of China(Grant No. 959, 1997).

STRUCTURE AND M?SSBAUER STUDY OF NANOCRYSTALLINE Ni-Zn FERRITE

Wang Li (王丽), Li Fa-shen (李发伸), Zhou Qing-guo (周庆国)   

  1. Department of Physics, Lanzhou University, Lanzhou 730000, China; Applied Magnetics Key Laboratory of the Ministry of Education, Lanzhou 730000, China
  • Received:2000-01-03 Online:2000-09-15 Published:2005-06-10
  • Supported by:
    Project supported by the Cooperative Projects between China and France of the Ministry of Education of China(Grant No. 959, 1997).

摘要: Ni1-xZnxFe2O4 (0.0≤x≤1.0) nanoparticles have been prepared by the polyvinyl alcohol (PVA) sol-gel method. The lattice parameter of Ni-Zn ferrite nanoparticles is larger than that of the bulk material. The variation of saturation magnetization (Ms) as a function of x has been studied. The M?ssbauer spectra of the samples at room temperature showed the presence of ultrafine particles, exhibiting superparamagnetic relaxation. At higher annealing temperature, the portion of the ferromagnetic ultrafine particles increased.

Abstract: Ni1-xZnxFe2O4 (0.0≤x≤1.0) nanoparticles have been prepared by the polyvinyl alcohol (PVA) sol-gel method. The lattice parameter of Ni-Zn ferrite nanoparticles is larger than that of the bulk material. The variation of saturation magnetization (Ms) as a function of x has been studied. The M$\ddot{\rm o}$ssbauer spectra of the samples at room temperature showed the presence of ultrafine particles, exhibiting superparamagnetic relaxation. At higher annealing temperature, the portion of the ferromagnetic ultrafine particles increased.

Key words: Ni-Zn ferrite, nanosized particle, M$\ddot{\rm o}$ssbauer spectra

中图分类号:  (Nanocrystals)

  • 61.46.Hk
75.50.Gg (Ferrimagnetics) 75.50.Tt (Fine-particle systems; nanocrystalline materials) 76.80.+y (M?ssbauer effect; other γ-ray spectroscopy) 81.16.-c (Methods of micro- and nanofabrication and processing) 81.20.Fw (Sol-gel processing, precipitation)