Abstract
Perpendicular magnetic anisotropy (PMA) was achieved in annealed Co2FeAl0.5Si0.5 (CFAS)/MgO-based multilayers with good thermal stability up to 400°C and a large anisotropy energy density Ku over 2.0×105J/m3. The thickness of the full-Heusler CFAS film to maintain PMA is up to 4.8nm in which the co-existence of disordered A2, ordered B2 and fully ordered L21 structures is observed. X-ray photoelectron spectroscopy analysis demonstrates that the origin of the PMA is the hybridization between Co 3d and O 2p orbitals at the CFAS/MgO interface.
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