First-Principles Study of Effects of Boron on Magnetic Anisotropy in MgO/CoFe(B)/X (X = Ru, Ta) Systems

摘要

We study the effects of boron on the magnetic anisotropy in the MgO/CoFe(B)/X (X = Ru, Ta) systems using relativistic first-principles calculations. It is found that the B atoms tend to be rejected from the CoFeB layer into the X underlayer. The system with no B atoms shows perpendicular magnetic anisotropy when the Fe atoms are adjacent to the MgO layer.