Perpendicular Magnetic Anisotropy in the CoFeB/Pt Multilayers by Extraordinary Hall Effect
The perpendicular magnetic anisotropy (PMA) in as-deposited [CoFeB/Pt]n multilayers has been studied by using extraordinary Hall effect (EHE). A clear PMA has been observed in the ultrathin (~ 0.5 nm) amorphous CoFeB layer sandwiched by Pt. Moreover, PMA in as-deposited [CoFeB/Pt]n multilayers is strongly dependent on the thickness of CoFeB and Pt and the number of CoFeB/Pt bilayers. With the increasing thickness of CoFeB and the number of CoFeB/Pt bilayers, the hysteresis loops change from rectangle into bow-tie shaped.
N. Liu et al., "Perpendicular Magnetic Anisotropy in the CoFeB/Pt Multilayers by Extraordinary Hall Effect", Materials Science Forum, Vol. 694, pp. 773-777, 2011