Experimental and theoretical studies on induced ferromagnetism of new (1 - x) Na0.5Bi0.5TiO3 + xBaFeO3-δ solid solution

Abstract

New solid solution of Na0.5Bi0.5TiO3 with BaFeO3?δ materials were fabricated by sol?gel method. Analysis of X-ray diffraction patterns indicated that BaFeO3?δ materials existed as a well solid solution and resulted in distortion the structure of host Na0.5Bi0.5TiO3 materials. The randomly incorporated Fe and Ba cations in the host Na0.5Bi0.5TiO3 crystal decreased the optical band gap from 3.11 to 2.48 eV, and induced the room-temperature ferromagnetism.