Formation and magnetic properties of Mn-Zn ferrites nanoparticles

G. Kroņkalns

Institute of Physics, University of Latvia, Salaspils-1, LV-2169, Latvia

Abstract
The magnetic properties of ferrites are dependent on the crystalline structure and the location of metal ions in the material. The correct crystalline structure of a certain ferrite is formed by a special, very complex, technology. Bulk ferrites are synthesized at high temperatures (> 1300 K) under a special, very complex, thermal treatment. On the other hand, the preparation of ferrite nanoparticles for magnetic fluids (MF) synthesis demands another special technology. More commonly used is the wet chemical coprecipitation production technology of magnetic nanoparticles for MF. The ferrites synthesized by the wet chemical method have different magnetic characteristics if compared to the ferrites prepared by standard ceramic methods. In this paper the preparation and physical properties of ultrafine \Mn _0.5\Zn _0.5\Fe ₂Ø ₄ ferrite particles and MF on its base, after their special thermal treatment, are studied. Table 1, Figs 5, Refs 31.