High annealing tolerance and the microstructure study in perpendicular magnetized MgO/CoFeB/MgO structures with thin W spacer layer
Journal of Magnetism and Magnetic Materials(2019)
Abstract
•The evolution of PMA in Ta/MgO/CoFeB/W/CoFeB/MgO/Ta annealed for different temperature is reported.•The composition-structure-property relationships in Ta/MgO/CoFeB/W/CoFeB/MgO/Ta is studied.•The oxygen released by WOx and MgO combined with Fe and Co, thereby more Fe or Co oxides were formed.
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Key words
W spacer layer,MgO/CoFeB/MgO,Perpendicular magnetic anisotropy (PMA),Thermal stability,XPS,High-resolution transmission electron microscopy (HRTEM)
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