We have sputter-deposited a series of (Pt/Co/Pt)/X multilayer structures with X=Pd,Ag,Cu displaying large Kerr rotations with improved perpendicular anisotropy and magnetic coercivity compared to the corresponding Co/X multilayers. In particular, Ar-sputtered (Pt/Co/Pt)/Pd multilayers, with the Pt layer thicknesses corresponding to one atomic monolayer, present Kerr rotations of the order of 0.26°, perpendicular anisotropy energies of 33×106 ergs/cc (Co) or better, and magnetic coercivities as high as 8 kOe.
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Bertero et al. (1994) studied this question.
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