Authors : C. L. Khobaragade, S. V. Soni, A. K. Akant, C. Umare, N. Waghdhare, P. K. Gaidhane and U. V. Rathod
Page Nos : 287-291
Description :
Abstract:
In the present investigation the samples with chemical composition CaFe11GaxCo1-xO19 with (x = 0.01 to 0.05) were synthesized using perfect stoichiometric proportions of reacting oxides by standard ceramic technique. It shows hexagonal magnetoplumbite (M) structure having unit cell dimensions ‘a’ and ‘c’ which varies in the range between 5-6 Å and 21-23 Å with space group P63/mmc (No.194). The saturation magnetization (Ms) decreases linearly from 27.39 to 26.72emu/g with increasing doping content from 0.01 to 0.05. The coercivity and retentivity increases successively with increase in Ga-Co concentration by changing magnetic field at 80 kOe. Crystallographic studies were explained on the cation distribution consistent with Gorter spin model of parallel alignment.
Keywords: Hexaferrite, Saturation magnetization, Coercivity, Retentivity, Curie temperature.
