Abstract
The SrFe12-xTbxO19 (x <= 0.10) nanohexaferrites (HFs) have been synthesized via citrate solgel approach. The phase formation, chemical purity, morphology and composition of the products were analyzed by X-ray powder diffractometer (XRD), Scanning and Transmission electron microscopes (SEM and TEM). Electromagnetic properties as such as frequency dependences of the loss tangents and reflection losses were investigated in the range of frequency from 2 to 18 GHz. The set of experimental data allowed to establish the nature of the electromagnetic power losses in SrFe12-xTbxO19 nanohexaferrites (HFs). It was demonstrated two main mechanisms of the electromagnetic radiation absorption in high frequency range (2-18 GHz): 1. Absorption due to natural ferromagnetic resonance (NFMR) and 2. Absorption due to dipole polarization. The results show the promise of using these materials for microwave applications (ensuring electromagnetic compatibility).