Epitaxial films of Ba-M type hexagonal ferrites

Single-crystal films of the Ba0.87Bi0.13Al3.96Fe8.04O19 hexagonal ferrite w ere prepared by liquid-phase epitaxy on single-crystal plates of the nonmag netic material SrGa12O19, whose crystal structure is similar to that of the film grown on it. A Mossbauer study of the films revealed that the magneti c moments of the iron ions in the bulk of a film are perpendicular to the f ilm growth plane, whereas the moments of the ions residing in a surface lay er similar to 300-nm thick are canted away from the normal of the film by 3 0 degrees +/- 5 degrees. (C) 2001 MAIK "Nauka/Interperiodica".