Extremely large flopping field and saturation field were realized in an FeCoB/Ru/FeCoB sputtered film by using subnanocrystalline (Fe 65Co35)88B12 soft magnetic material with high saturation magnetization. Phenomenological analysis of synthetic-antiferromagnetic coupling revealed that the bilinear coupling energy induced in this film was three times larger than that in a Co 91Zr4Nb5/Ru/Co91Zr 4Nb5 film. This large bilinear coupling is thought to be the result of not only the suppression of ferromagnetic coupling due to the flat interface between the Ru and FeCoB layers but also the small Ru thickness for the first peak of 0.3 nm caused by the Fe-rich soft magnetic material.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)