Structural, dielectric, and thermal properties of Zn and Cr doped Mg- Co spinel nanoferrites

Abstract

Abstract Nanoferrites play a pivotal role in resolving worldwide electronic and microwave devices. Spinel ferrites have exceptional structural, morphological, and dielectric properties. The composition Zn 0.5–xMg0.25+x Co 0.25Cr1–x Fe 1+x O 4 (ZMCCF) where x varies from 0–0.5 with the difference of 0.25 was synthesized via auto combustion (sol-gel) route. The structural, thermal, and dielectric characterizations were done to observe the responses of variation of x in designed nanoferrites. The designed nanoferrites with a variation of x experienced a promising change in structural, thermal, and dielectric responses. Based on Koop’s theory, the dielectric constant decreases with the increase in frequency, which is the favorable trend of spinel ferrites. The different cationic distributions in the spinel structure endorse this behavior. The maximum value of the tangent loss at low frequencies reflects the application of these materials in medium-frequency devices. Therefore, planned spinel nanoferrites may benefit advanced electronics and microwave devices.