Authors : C. L. Khobaragade, S. B. Deshpande, S. V. Soni and K. G. Rewatkar
Page Nos : 51-56
Description :
Abstract:
In the present investigation, the samples with chemical composition CaSr2 (MnZn)x/2Fe16-xO27 with (x = 0 to 1) have been synthesized using perfect stoichiometric proportions of nitrates by chemical co-precipitation technique. The pellets of 15 mm diameter were prepared and sintered at 1000℃ for 4 hr and characterized by using XRD, SEM, electrical and magnetic properties. XRD studies of the samples showed hexagonal W-type structure with unit cell dimensions ‘a’ and ‘c’ varies from 5 to 6 Ǻ and 32 to 34 Ǻ pertaining to space group P63/mmc (No. 194). The variation in the values of lattice parameter has to be recorded with increase in Mn-Zn conc. The magnetic properties of prepared W-type Ca-hexaferrite powder were investigated by VSM studies at 20,000 G magnetic field. The transition temperature and activation energies have been investigated from electrical behaviour of the samples.
Keywords: XRD, SEM, VSM, Electrical and Magnetic properties, Curie temperature.
