SUBSTITUTED NiZn FERRITES FOR PASSIVE SENSOR APPLICATIONS

Jozef Sláma – Anna Grusková – Mariana Ušáková – Elemír Ušák – Ján Šubrt – Jozef Lukáč

   The paper is devoted to the preparation of NiZn ferrite with small substitutions of copper by means of ceramic technology. The influence of small Be and/or Cu substitution on various magnetic properties of NiZn ferrites (such as eg the Curie temperature T_c, coercivity H_c, initial permeability μ_i, complex permeability μ*, saturation magnetisation M_s and hysteresis loop shape) has been analysed by means of various experimental methods and interpreted from the point of view of preparation technology optimisation and possible applications of such materials in sensor technology. A strong correlation between the substituent content and resulting properties has been observed, thus allowing preparation of material with the properties tailored for any particular application.

Keywords: substituted ferrites, magnetic properties, passive sensors

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