The impact of Ta thickness on magnetic anisotropy and interlayer magnetic coupling is
evaluated for the Ta-FeCoB-MgO thin film system commonly used in magnetic tunnel
junctions. It is shown that there exists a window of Ta thickness where strong magnetic
coupling of FeCoB with another magnetic layer is achievable through Ta while still
maintaining properties required for use in a perpendicular magnetic tunnel junction. We also
expand on existing knowledge about the role of annealing temperature, film composition …