Preparation and Magnetic Characteristics of Co1-δZnδFe2O4 Ferrite Nanopowders
M. Kubisztal, I. Herok, M. Karolus, K. Prusik and G. Haneczok
Institute of Materials Science, University of Silesia, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland
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In the present paper the Co1-δZnδFe2O4 (0 ≤ δ ≤ 1) ferrite nanopowders with a spinel type structure were synthesized using a chemical co-precipitation technique with constant flow rate ν FR=120 cm3/min at three different reaction temperatures i.e. Tr =50°C, 70°C and 90°C. Magnetic and structural characteristics of the obtained materials were investigated by means of X-ray diffraction method, transmission electron microscopy and vibrating sample magnetometer. In the course of studies hysteresis loops M(μ0H) and the relations of magnetization M7T (determined at μ0H=7 T), squareness ratio S and the Néel temperature TN versus Zn content were determined and discussed in detail. It was shown that for δ<0.6 the increase in reaction temperature Tr results in a significant increase of the measured magnetic characteristics. In particular, in the case of Co0.8Zn0.2Fe2O4 ferrite nanopowder magnetization M7T reaches maximal value of about 80 emu/g.

DOI: 10.12693/APhysPolA.131.1236
PACS numbers: 75.47.Lx, 75.50.Gg, 75.50.Tt, 75.75.-c, 75.75.Cd