Effects of Iron Deficiency on Magnetic Properties of NiZn Ferrites |
| J. Sláma, M. Šoka, M. Ušáková, E.Ušák
Institute of Electrical Engineering, Slovak University of Technology in Bratislava, Ilkovičova 3, 812 19 Bratislava, Slovakia |
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| Selected magnetic properties of (Ni0.33Zn0.67)1+xFe2-xO4 ferrite (where x=0,0.08,0.12,0.2) are investigated. The Curie temperature and the maximum flux density of Ni0.33Zn0.67 ferrites with Fe deficiency increases due to the increase in super-exchange interactions between A-B sites of spinel structure. Deficiency of Fe results in a decrease of grain size, susceptibility and permeability, meanwhile the coercivity and resonant frequency increase. The physical characteristics of the resulting products were investigated by X-ray diffraction, Mössbauer spectroscopy and thermomagnetic analysis. Deficiency of Fe in the studied composition extends temperature scale of the ferrite applicability, as well as enhances a temperature stability of ferrite. |
DOI:10.12693/APhysPolA.137.892 topics: NiZn ferrites, iron deficiency, magnetic properties |