| Popis: |
Perpendicular magnetic anisotropy (PMA) was realized by inserting Pd layer into the stack of Ta/Pd (0–2.4 nm)/Co 2 FeAl 0.5 Si 0.5 /MgO/Ta. The realization of PMA is accompanied by the (Co, Fe)–O reduction at Co 2 FeAl 0.5 Si 0.5 /MgO interface under annealing. Without inserting Pd layer, the annealed Ta/Co 2 FeAl 0.5 Si 0.5 /MgO/Ta film presents an in-plane magnetization. Through X-ray photoelectron spectrometry analyzes, it was found that the oxygen was enriched at the interface of Ta/Co 2 FeAl 0.5 Si 0.5 . This work clarifies that the inserted Pd layer effectively blocks the diffusion of interfacial oxygen to Ta layer, achieving the beneficial redox reaction at Co 2 FeAl 0.5 Si 0.5 /MgO interface to realize PMA. |
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