Abstract
Aurivillius phase SrBi2Nb2-xFexO9 (x = 0, 0.1, 0.2, 0.3, 0.4 and 1) ceramics prepared by conventional solid-state method. The introduction of Fe does not change the layered perovskite structure of SrBi2Nb2O9. Upon increasing Fe content, the Tm of the samples shifts from 437 °C (x = 0) to 524 °C (x = 0.4) due to lattice effect. Temperature dependence of dielectric permittivity described according to modified Curie-Weiss law. When reaching up x = 0.4, the diffuseness of the dielectric peak becomes more pronounced. The minimum value of Pr and Ec obtained when x = 0.3 because of Fe3+ weakens Nb-O hybridization and more oxygen vacancies appeared in samples. The antiferromagnetic properties arise for the samples is explained by super exchange interaction (Fe3+-O-Fe3+).
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