Microstructure and magnetic properties of nanocrystalline (Ni 0·5Zn 0·5) xCo 12xFe 2O 4 ferrite by spraying co-precipitation method

Y. Liu, Y. B. Qiu, T. Qiu, F. F. Min, J. B. Zhu, M. X. Zhang

科研成果: 期刊稿件文章同行评审

1 引用 (Scopus)

摘要

Nanocrystalline (Ni 0·5Zn 0·5) xCo 12xFe 2O 4 with 0(x(1·0 are prepared by spraying co-precipitation method. Their microstructure and magnetic properties are investigated. The results show that nanocrystalline (Ni 0·5Zn 0·5) xCo 12xFe 2O 4 ferrites are spinel phase. Coercivity and retentivity of specimens increase with cobalt content. The enhancement of the saturation magnetisation up to a maximum value of 102·1 A m2 kg21 in nanocrystalline (Ni 0·5Zn 0·5)0·5Co0·5Fe 2O 4 ferrite is observed. This can be attributed to the change of the net magnetic moment between the sublattices of structure for the substitution of Ni 2+ and Zn 2+ ions with Co2z ions. The coercivity of nanocrystalline (Ni 0·5Zn 0·5) 0·5Co0·5Fe 2O 4 ferrite increases monotonously in the grain size regime d,69 nm, and then coercivity decreases with grain size. The initial increase in coercivity of the nanocrystalline (Ni 0·5Zn 0·5)0·5Co0·5Fe 2O 4 ferrite with increasing size is due to the enhanced role of the surface and its strong random anisotropy.

源语言英语
页(从-至)170-174
页数5
期刊Materials Research Innovations
16
3
DOI
出版状态已出版 - 6月 2012

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