Preparation and magnetic properties of barium ferrites substituted with manganese, cobalt, and tin

Liu, Y., Drew, M. G.B. and Liu, Y. (2011) Preparation and magnetic properties of barium ferrites substituted with manganese, cobalt, and tin. Journal of Magnetism and Magnetic Materials, 323 (7). pp. 945-953. ISSN 0304-8853 doi: 10.1016/j.jmmm.2010.11.075

Abstract/Summary

Barium ferrites substituted by Mn–Sn, Co–Sn, and Mn–Co–Sn with general formulae BaFe12−2xMnxSnxO19 (x=0.2–1.0), BaFe12−2xCoxSnxO19 (x=0.2–0.8), and BaFe12−2xCox/2Mnx/2SnxO19 (x=0.1–0.6), respectively, have been prepared by a previously reported co-precipitation method. The efficiency of the method was refined by lowering the reaction temperature and shortening the required reaction time, due to which crystallinity improved and the value of saturated magnetization increased as well. Low coercivity temperature coefficients, which are adjustable by doping, were achieved by Mn–Sn and Mn–Co–Sn doping. Synthesis efficiency and the effect of doping are discussed taking into account accumulated data concerning the synthesis and crystal structure of ferrites.