Maxwell–Wagner relaxation and magnetodielectric properties of Bi0.5La0.5MnO3 ceramics

The complex permittivity ε = ε′–iε″ of manganite bismuth–lanthanum Bi0.5La0.5MnO3 ceramics has been measured at temperature T = 78 K in the frequency range f = 200–105 Hz and in the magnetic induction range B = 0–5 T. Dielectric relaxation and the pronounced magnetodielectric effect have been detected. The explanation based on the superposition of Maxwell–Wagner relaxation and the magnetoresistance effect has been proposed.