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Interface Magnetic Anisotropy Between L1 _{0} -FePt and Nonmagnetic Layers

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3 Author(s)
Seki, T. ; Inst. for Mater. Res., Tohoku Univ., Sendai, Japan ; Kikuchi, Y. ; Takanashi, Koki

In order to examine the interface magnetic anisotropy at the interface between an L10-FePt layer and a nonmagnetic layer, the magnetic properties for thin films with Au buffer/L10-FePt/capping layers were investigated, where MgO or Au was used as a capping layer. When the thickness of the L10-FePt layer (tFePt) was reduced from 5 nm to 1.5 nm, MgO-capped L10-FePt showed larger perpendicular magnetic anisotropy than those of Au-capped L10-FePt and uncapped L10-FePt. The plot of the magnetic anisotropy energy per sheet area as a function of tFePt suggested that the existence of the interface magnetic anisotropy between L10 -FePt and MgO layers, value of which was estimated to be 630 μJ/m2.

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Magnetics, IEEE Transactions on  (Volume:48 ,  Issue: 11 )