Synthesis and characterization of spinel ferrites for microwave devices

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 x 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. [GRAPHICS]

Automated summary

By adjusting the chemical composition, the prepared ferrite samples with low dielectric loss and high resistivity suitable for microwave devices were achieved in this study.