Fig. 6: Scanning transmission electron microscopy (STEM) data for the W/W–V/CoFeB/MgO/Ta heterostructure.

a, b HR-TEM images of the as-deposited and 300 °C annealed samples. c, d HAADF-STEM image and element line profiles of the as-deposited and 300 °C annealed samples. The composition of the alloy layer in the atomic ratio is W₈₀V₂₀.