Perpendicular magnetic anisotropy of full-Heusler films in Pt/Co2FeAl/MgO trilayers

摘要

We report on perpendicular magnetic anisotropy (PMA) in a Pt/Co2FeAl/MgOsandwiched structure with a thick Co2FeAl layer of 2-2.5 nm. The PMA isthermally stable that the anisotropy energy density Ku is 1.3{\times}106erg/cm3 for the structure with 2 nm Co2FeAl after annealing at 350 oC. Thethicknesses of Co2FeAl and MgO layers greatly affect the PMA. Our resultsprovide an effective way to realize relative thick perpendicularly magnetizedHeusler alloy films.