A study of the new perovskite solid solution series SrFexRu1−xO3−y by ruthenium-99 and iron-57 Mössbauer spectroscopy

Abstract The magnetic and structural properties of the solid solution SrFe x Ru 1− x O 3− y (0 ⩽ x ⩽ 0.5) have been studied using 57 Fe and 99 Ru Mossbauer spectroscopy and other techniques. These phases, which are here reported for the first time, have a distorted perovskite structure. The iron substitutes exclusively as Fe 3+ and thereby causes oxygen deficiency, but has little effect on the magnetic behaviour of the Ru 4+ until x > 0.2, whereupon the metallic band system begins to revert to a localized electron structure. The properties of a sample with x = 0.3 are complex and intermediate in character. For x > 0.3 the oxygen deficiency is reduced by substantial oxidation to Ru 5+ until at x = 0.5 the system corresponds to Sr 2 Fe 3+ Ru 5+ O 6 .