Dependence of Magnetic Properties of Co/Pt Multilayers on Deposition Temperature of Pt Buffer Layers

Abstract

A 15-nm-thick Pt buffer layer was deposited on a glass slide at temperature T s (Pt buf ) ranging from 30 to 300°C by e -gun evaporation. Following the cooling in vacuum to ambient temperature, Co and Pt layers have been alternately deposited on it. Very large perpendicular anisotropy and coercivity have been obtained at T s (Pt buf ) higher than 200°C. The (111) preferred orientation of the Co/Pt multilayer as well as the Pt buffer layer became more pronounced with elevating T s (Pt buf ), to which the enhancement of perpendicular anisotropy with elevating T s (Pt buf ) might be ascribable.