부산대학교 도서관

The effects of Mg ion doping on the cobalt-based spinel ferrites nanoparticles synthesized via sol–gel auto-combustion method have been investigated. Dopant concentration values varied in Bi0.2MgxCo0.8−xFe2O4 at x = 0.0, 0.15, 0.35, 0.55, 0.7 and 0.8, respectively. The variation of Mg-Co substitution has a significant effect on the structural, morphological, thermal, electrical and dielectric properties of BiMgCo nanoferrites. The dielectric constant, quality factor, loss coefficient of the material, AC conductivity and its resistivity were studied as a function of increasing frequency in the range of 100 Hz–50 MHz at room temperature. The results are evident of normal behavior of ferrites. Inhomogeneous patterns are observed for all dielectric parameters at lower frequency range but remain constant at high frequencies. This leads to utilize the synthesized material, i.e., BiMgCo nanoferrites for applications in high frequency devices.