AC impedance studies on ferroelectromagnetic ceramics

Abstract

In the present study the tool of impedance spectroscopy was utilized to characterize dielectric behavior of ferroelectromagnetic ceramics of Bi9Fe5Ti3O27 composition fabricated by hot pressing method from the stoichiometric mixture of oxides Bi2O3, TiO2 and Fe2O3. Impedance spectroscopy was applied to characterize relaxation processes present in the system at various temperatures as well as to separate the bulk, grain boundary, and electrode processes of polycrystalline ceramic material. The Kramers-Kronig data validation test was employed in the impedance data analysis. Experimental data were fitted using the CNLS fitting method. Agreement between experimental and simulated data was established. © Published under licence by IOP Publishing Ltd.