Mössbauer study of Fe-doped BaTiO3 of different grain sizes induced by ball mill technique

Abstract Fe-doped BaTiO 3 has been prepared by the solid state reaction method. Nanonization of sample has been achieved by using high energy ball milling. Tetragonal phase along with a small amount of hexagonal phase has been identified by room temperature X-ray diffraction (XRD) technique in all the samples. Mossbauer spectrum of the as-prepared sample shows multi-site substitution of Fe atoms. Magnetic interactions between Fe atoms placed at three different configurations have been evidenced by the presence of three sextets. A doublet pattern has also been observed for Fe atoms situated in isolate manner without any magnetic exchange. Suppression of sextet patterns in milled samples has been attributed to the presence of superparamagnetism.