Mössbauer effect measurements were made on solid solution Fe 1-xCrxBO3, with 0≤x≤0.60, at room and at liquid nitrogen temperatures and on Fe0.50Cr0.50BO 3 at temperatures from 82.5 to 150 K. The hyperfine field strength at Fe3+ sites decreases with increased Cr content. The isomer shift increases appreciably in samples containing Cr at low concentrations. The Mössbauer linewidth increases with increasing Cr content and exhibits a shoulder at 0.40≤x≤0.60. The data suggest that the presence of Cr 3+ ions disrupts the magnetic superexchange interaction. Variations in the isomer shift, magnetic hyperfine splitting and linewidth as a function of increasing temperature in samples of Fe0.50Cr0.50BO 3 suggest that a significant antiferromagnetic component is present in samples with Cr concentrations 0.40≤x≤0.60.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)