Previous article Next article Contents  

M. I. Afanasov, M. V. Korolenko, M. A. Kolotyrkina, P. B. Fabritchnyi

Effect of valence state of antimony dopant ions on their spin polarization by chromium cations on the surface of Cr2O3 antiferromagnet


Effect of As shown by 121Sb Mössbauer measurements, oxidation of Sb(III) ions located on the surface of Cr2O3 produces an increase in the value of transferred hyperfine field H(121Sb) of about a factor of 2. The observed variation is consonant with that previously reported for 119Sn surface dopant ions. The increase in H to be related to removal of the lone-pair indicates that spin polarization of both Sb(V) and Sn(IV) ions within ferrodielectric matrix is governed by the same mechanism: 3d-electron density transfer from neighboring paramagnetic cations into 5s-orbitals of the diamagnetic ones.
Moscow University Chemistry Bulletin.
2002, Vol. 43, No. 3, P. 202

Copyright (C) Chemistry Dept., Moscow State University, 2002
   Editorial board
   Tables of Contents

The site is supported by Russian Foundation for Basic Research
  The using of published on this page materials is not allowed without special permission
Copyright (C) Chemisty Department of Moscow State University
Web-Editor: B.I.Pokrovskii
Web-design: Copyright (C) MIG and VVM