Synthesis and characterization of spinel ferrites for microwave devices

Abstract

The prepared ferrite system with chemical formula Mg0.6Li0.4YbxFe2−xO4; x = 0.00 and 0.1 having valuable magnetic and electrical properties. The X-ray diffraction data confirmed the cubic spinel structure with single phase. The one order increase in magnitude of dc resistivity was found with ‘Yb’ substitution as compared to Mg–Li based ferrites. The room temperature dielectric loss under the frequency of 3 GHz was 3 × 10−3. By using better stoichiometric ratio, size and the nature of substituted element, one can achieve suitable combination of low dielectric loss and high resistivity. In present work, the dielectric study (as a function of frequency) was done in frequency range of 0.1–20 MHz at different temperatures. The magnetic properties were measured up to applied field of 2 KOe. The low values of dielectric loss and high value of dc resistivity suggested that prepared samples may be suitable for microwave devices.