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JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, vol.17, pp.2975-2986, 2022 (SCI-Expanded)
In this paper, conductivity, dielectric, and microwave properties of SrNbxYxFe12-2xO19 (0.00 <=& nbsp;x <=& nbsp;0.05) hexaferrites (SrNbY HFs) synthesized by the citrate sol-gel method were investigated. Some key parameters compatible with the electrical and dielectric functions of SrNbY HFs have been extensively evaluated as functions of bias frequency, measurement temperature, and co-substitution ratios in logarithmic 3D graphs by complex impedance spectroscopy. It has been observed that although the co-substitution ratio is highly functional on dielectric parameters such as both the dielectric constant and dielectric loss, as well as the dissipation factor, it has a very low influence on the conductivity mechanism. Depending on the substitution ratios of Nb and Y ions and the transition temperature region, the activation energy was calculated to vary between 58 and 476 meV. Microwave properties were measured as S-parameters using a coaxial line in the range of 2-12 GHz. It was analysed the frequency dependences of the real/imaginary parts of the permittivity and permeability for all samples. Reflection losses vs. frequency were calculated as a function of the substitution level. Coefficients of the RL (-12.5 & nbsp; ... -16.8 dB) confirm practical importance for electromagnetic compatibility at high frequencies. (C)& nbsp;2022 The Author(s). Published by Elsevier B.V.& nbsp;