151Eu and 57Fe Mössbauer spectroscopy study on rare-earth transition element oxides

Abstract Series of rare-earth transition element oxides Eu 0.2 R 0.8 FeO 3 and EuFe 0.8 M 0.2 O 3 ( R = rare-eartjs, M=Sc, Cr, Mn, Co) are synthesized. X-ray diffraction determinations show that these compounds possess perovskite structures. Mossbauer spectra of both 151 Eu and 57 Fe are studied. The results show that the isomer shift of 151 Eu in Eu 0.2 R 0.8 FeO 3 depends on the unit cell volume V 1 3 of the compounds in a linear fashion. There is a certain relationship between the quadropole splitting and the lattice parameters 1 a 3 in Eu 0.2 R 0.8 FeO 3 . The hyperfine field parameters Hin of 57 Fe Mossbauer spectra are relating to R ions.