¹¹⁹Sn Mössbauer study of sol–gel synthetized Fe _x Sb _y Sn_{1 − x − y} O_2 − δ powders

Abstract

¹¹⁹Sn Mössbauer spectroscopy was used to study Sn_1 − x ⁵⁷Fe _x O_2 − δ and Fe _x Sb _y Sn_{1 − x − y} O_2 − δ sol–gel synthesized ferromagnetic powders. ¹¹⁹Sn Mössbauer spectra of powder samples showed envelopes characteristic of a relatively broad Sn(IV) line. Small but significant differences can be found among the spectra belonging to different compositions and heat treatments. The spectra were decomposed into two doublets, one of these with unusually high quadrupole splitting was assigned to the defects playing very important role in the realisation of ferromagnetism in these materials.