Slama J., Soka M., Gruskova A., Dosoudil R., Jancarik V., Degmova J. Magnetic properties of selected substituted spinel ferrites

Journal of Magnetism and Magnetic Materials. - 2013. - №326. - P. 251-256.Polycrystalline NiZn ferrites with the chemical formula (Ni0.3Zn0.7)1-xMexFe2O4 where Me is Cu(2+) or Be(2+) ion with x=0.05, 0.1 and 0.25 have been prepared by a ceramic method. Selected magnetic properties such as saturation magnetisation Ms, Curie temperature Tc, coercivity Hc and permeability of the ferrites have been measured and discussed to compare of the substituted Li0.5-0.5y+0.5tZnyTitFe2.5-0.5y-1.5tO4 ferrites, when y=0.1, 0.2, 0.3, 0.4 and t=0.35, 0.45, 0.55.The samples have been prepared by a ceramic method and the samples Li0.5-0.5yZnyFe2.5-0.5yO4 by a chemical way. Mossbauer spectra and crystallographic parameters of selected samples have been analysed as well.