Dielectric relaxation in magnetoelectric composite 0.85BiFeO3–0.15MgFe2O4

Dielectric properties of 0.85BiFeO3–0.15MgFe2O4 composite fabricated with conventional ceramic technology are studied in the temperature interval of 20–250°C at frequencies of 25 Hz to 1 MHz. Dielectric relaxation is observed, the nature of which is discussed in the context of a mechanism of interaction between ferroelectric domain boundaries and point defects.