Research Paper

Synthesis and Magnetic Properties of Nanocrystalline Ni1-x ZnxFe2O4 Ferrite

  • LIU Yin ,
  • QIU Tai
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  • 1. School of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China; 2. Deptartment of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China

Received date: 2006-06-09

  Revised date: 2006-07-24

  Online published: 2007-05-20

Abstract

Nanocrystalline Ni1-x ZnxFe2O4 ferrite with 0≤x≤1, was successfully prepared by a spraying-coprecipitation method. The microstructure was investigated by using TG-DSC, XRD, SEM, TEM as well as BET. Magnetic properties were measured with a vibrating sample magnetometer (VSM) at room temperature. The results show that uniform and fine nanocrystalline Ni1-xZnxFe2O4 ferrite powders are obtained by the spraying-coprecipitation method. The grain size is about 30 nm calcined at 600 for 1.5h. There are a few agglomerates with average sizes below 100nm. The specific saturation magnetization of nanocrystallineNi1-x ZnxFe2O4 ferrite increases with the concent of Zn2+ at room temperature, and maximum σs is 66.8A·m2/kg as the content of Zn2+ is around 0.5. When the grain size is 41nm, the coercivity Hc of nanocrystalline Ni0.5Zn0.5Fe2O4 ferrite arrives at 5.06kA/m, and then it decreases with the increase of the grain size. The results may be explained in terms of intense random magnetocrystalline anisotropy model in nanocrystalline materials.

Cite this article

LIU Yin , QIU Tai . Synthesis and Magnetic Properties of Nanocrystalline Ni1-x ZnxFe2O4 Ferrite[J]. Journal of Inorganic Materials, 2007 , 22(3) : 391 -394 . DOI: 10.3724/SP.J.1077.2007.00391

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