[14p-PA1-1~74] 10 スピントロニクス・マグネティクス

[14p-PA1-40] Graphene covered FePd ferromagnetic electrodes as a platform for perpendicular-2D spin devices

〇永沼 博^1,2,3,4、G Florian^6,5、A Snader⁵、C Carrètèro⁵、R Nicolas⁵、B Dlubak⁵、P Seneor^5,6 (1.東北大CIES、2.東北大工、3.東北大CSIS、4.東北大CSRN、5.CNRS/Thales、6.Univ. Paris Sud)

キーワード：グラフェン、二次元材料、FePd

We report on the large-scale integration of graphene layers with a FePd perpendicular magnetic anisotropy platform as required for further scaling of spin circuits. A L1₀-FePd ordered alloy showing both high magnetocrystalline anisotropy and low magnetic damping constant is formed by r.f. magnetron sputtering. The graphene layer is then integrated on top by a large-scale chemical vapor deposition step. A step-by-step study, including structural analyses by X-ray diffraction and magnetic analyses by Kerr microscopy, shows the full preservation of FePd properties during the graphene integration. This scheme provides thus a graphene protected perpendicular spin source with resistance to oxidation, atomic flatness, stable crystallinity, and large perpendicular magnetic properties. This in turns opens the way to the generalization hybrid 2D-materials on optimized PMA platforms, sustaining the development of spintronics circuits using perpendicular spin-sources.