MAGNETO-CHEMICAL COMPOSITION AND MAGNETIC PROPERTIES OF THE SELECTED SPINEL FERRITES

Vladimír Jančárik – Martin Šoka – Mariana Ušáková – Rastislav Dosoudil

   The aim of the presented research is to prepare thermally stable nickel zinc ferrite, with suitable Ni²⁺/Zn²⁺ ratio, and exam-ine the effect of partial substitution of Zn²⁺ ions with Cu²⁺ and Co²⁺ ions on the structural and magnetic properties. For that pur-pose, there were prepared the Ni_xZn_1-xFe₂O₄ (x = 0.30, 0.33, 0.36, 0.42, 0.50, 0.70) and Ni_0.33Zn_0.57Me_0.1Fe₂O₄ (Me = Cu²⁺/Co²⁺) ferrite compositions by the self-propagated combustion method at the temperature of 850°C. Applied method of preparation al-lows to obtain oxide based materials with small particles and low process temperatures..

Keywords: nickel zinc ferrites, structural properties, magnetic properties

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