STUDY OF MAGNETIC PROPERTIES OF SAMARIUM SUBSTITUTED NICKEL-ZINC FERRITES

Mariana Ušáková – Elemír Ušák – Martin Šoka

   NiZn ferrites with iron ions partly substituted by samarium having the chemical composition Ni_0.42Zn_0.58Sm_xFe_2-xO₄ (x = 0.00, 0.02, 0.04, 0.06, 0.08 and 0.10) were synthesized by means of standard ceramic technology at the temperature of 1200°C for 6 hours. The influence of a small amount of Sm³⁺ ions substituting Fe³⁺ on the resulting magnetic properties of pre-pared ferrite samples such as Curie temperature, coercive field, remanent magnetic flux density, hysteresis loop area, amplitude and initial permeability has been studied. The chemical composition of prepared samples was studied using scanning electron microscopy with energy-dispersive X-ray spectroscopy. As confirmed by the measurements of magnetic properties at room temperature, the substitution of Sm strongly influences the resulting magnetic properties of studied material in an easily con-trolled way.

Keywords: rare earths, Sm-doped NiZn ferrites, magnetic properties, hysteresis loops

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