Magnetic and magneto-optical properties of (Co-Bi)/Pt AND Co/(Pt-Bi) multilayers

Both the magnetizations and perpendicular magnetic anisotropy at 300K decrease with Bi content x in (Co1-xBix)/Pt multilayers, whereas the magnetization increases with x in (Co/Pt1-xBix). The maximum magnetooptical Kerr rotation increases with x up to x = 0.12, then decreasing with x for (CoBi/Pt). On the other hand, the rotation decreases with x in (Co/PtBi). The photon energy for the maximum Polar Kerr rotation becomes smaller with x for (Co/PtBi), but it remains unchanged for (CoBi/Pt). © 1994, American Institute of Physics