Investigation of Microwave Absorptive Behavior of La-Na Substituted M-Type Co-Zr Barium Hexaferrites in X-Band

La-Na-substituted Co-Zr barium hexaferrites were fabricated using the conventional ceramic sintering method. Characterization techniques like X-ray diffraction (XRD), scanning electron microscopy (SEM), vibration sample magnetometry (VSM) and vector network analysis (VNA) were used to analyze structural, magnetic and microwave absorption properties of prepared ferrites. The results show that the magnetoplumbite structures for all the samples have been formed. The magnetic properties such as saturation magnetization (M (s)), remanence (M (r)) and coercivity (H (c)) were calculated from hysteresis loops obtained using a vibrating sample magnetometer (VSM). Also the present investigation demonstrates that microwave absorber using Ba(1 - 2x)La (x) Na (x) Fe10CoZrO19 ferrite can be fabricated for the applications in frequency band from 8.2 to 12.4 GHz, with a reflection loss less than -10 dB for specific frequencies, by controlling the molar ratio of the substituted ions.