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

Nanoferrites play a pivotal role in resolving worldwide electronic and microwave devices. Spinel ferrites have exceptional structural, morphological, and dielectric properties. The composition Zn Mg-0.5-x(0.25+x ) Co Cr-0.25(1-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.

Automated summary

Nanoferrites, particularly spinel ferrites, are crucial in solving global electronic and microwave device challenges due to their outstanding structural, morphological, and dielectric properties. Through the auto combustion (sol-gel) route, nanoferrites with a composition formula of Zn Mg-0.5-x(0.25+x ) Co Cr-0.25(1-x ) Fe (1+x ) O (4) (ZMCCF), where x varies from 0 to 0.5 with a difference of 0.25, were synthesized. The variations in x resulted in promising changes in the structural, thermal, and dielectric responses of the designed nanoferrites. According to Koop's theory, the dielectric constant decreases as the frequency increases, which is a favorable trend for spinel ferrites. The different distribution of cations in the spinel structure supports this behavior, and the maximum tangent loss at low frequencies reflects the potential application of these materials in medium-frequency devices. Therefore, the planned spinel nanoferrites have the potential to significantly benefit advanced electronics and microwave devices.