Abstract
The effect of Cu doped into Pt spacer layers on magneto-optical properties for sputtered Pt/Co multilayers has been investigated. The polar Kerr rotation θk oscillates with the content of Cu in Pt spacer layers, and an obvious enhancement of θk at the first and second peaks on its oscillation curve can be seen. The numerical calculation indicates that the components of conductivity tensor in PtCu layers make a simultaneous oscillation with the polar Kerr rotation. These behaviors may result from the spin polarization in PtCu layers.
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