Parameter distribution in depth magnetic microstructure epitaksialnoy film in yttrium iron garnet

Abstract

The magneticmicrostructure parameters distribution through the thickness of the epitaxial iron garnet films surface layer is investigated by the method of Conversion electron Mössbauer spectroscopy com bined with chemical etching. It is shown that the degree of iron valence change Fe3+→Fe2+ in the cry stal structure of YIG, caused by ions Pb4+, Pb2+ and Pt4+ entry, takes place in the surface layers of the film with thickness 0,15—0,18 mkm. Installing the stoichiometric values of octa­ and te trahedral cation sublattice populations occurs at a depth of 0,40—0,50 mkm. It is proved that the most sensitive to changes in neighbor surroundings are octahedral coordinated iron ions. Changes in the spatial orientation of the magnetic moments of the octa­ and tetra­sublattices though the thickness of the yttrium iron garnet film surface layer are traced.