Investigation of the Ba doping effect on the dielectric properties of LaFeO3 ceramics
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Ba-doped LaFeO3 [La1-xBaxFeO3 (0 ≤ x ≤ 0.4)] ceramics were synthesized using the solid-state reaction method. The phasepurity and structural characteristics were confirmed by X-ray diffraction, revealing that all samples exhibit a cubic structurewith a Pm-3m space group. X-ray photoelectron spectroscopy was used to identify the chemical state of the componentelements. The dielectric properties and conductivity measurements have been carried out. It was found that doping Ba intothe ferrite LaFeO3 resulted in an enhancement of dielectric constant, with the dielectric loss showing Debye-type dipolarrelaxation behavior. This behavior is linked to the polarization from small polarons caused by electron hopping betweenFe2+ and Fe3+ ions.
Abstract
Ba-doped LaFeO3 [La1-xBaxFeO3 (0 ≤ x ≤ 0.4)] ceramics were synthesized using the solid-state reaction method. The phasepurity and structural characteristics were confirmed by X-ray diffraction, revealing that all samples exhibit a cubic structurewith a Pm-3m space group. X-ray photoelectron spectroscopy was used to identify the chemical state of the componentelements. The dielectric properties and conductivity measurements have been carried out. It was found that doping Ba intothe ferrite LaFeO3 resulted in an enhancement of dielectric constant, with the dielectric loss showing Debye-type dipolarrelaxation behavior. This behavior is linked to the polarization from small polarons caused by electron hopping betweenFe2+ and Fe3+ ions.