Article ID Journal Published Year Pages File Type
1801671 Journal of Magnetism and Magnetic Materials 2005 7 Pages PDF
Abstract

Nickel zinc ferrites with generic formula, NiXZn1−XFe2O4 (with X=0.28–0.40) were synthesized by an oxalate precursor route starting with acetates to study their magnetic properties. The saturation magnetization versus temperature curves resemble those of R type ferrites. The system shows the presence of Yafet–Kittel type of spin. It is observed that magnetic moment (nB) values increase with the addition of Ni2+. The remanance ratio R tends to increase with the addition of Ni2+, which has been attributed to the increase of magnetocrystalline anisotropy constant (K1). The values of R compare well with the theoretical value (0.87). The coercive force (Hc) tends to increase with the addition of Ni2+, which has been related to the reverse domain formation. Studies on temperature variation of R and Hc reveal that these parameters are thermally insensitive, which confirms the presence of multi domain grains in the material. These observations have been supported by a.c. susceptibility studies.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Condensed Matter Physics
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