Abstract
Various rare-earth sesquioxides and iron multilayers have been examined to investigate the perpendicular magnetic anisotropy for iron layers. Both Y 2O 3 and Yb 2O 3 layers with the same c-rare-earth structure (cubic) as Eu 2O 3 make Fe moments perpendicular to the film plane, while Pr 2O 3/Fe films show usual in-plane anisotropy. Lattice strain through the interfaces is considered to be a primary origin of the anisotropy. Mössbauer measurements with external fields suggest some antiparallel interaction between the perpendicular magnetic domains in Fe layers.
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