Magnetic properties of Ni/Pt multilayers

Abstract We have grown Ni/Pt multilayers with Pt buffer layer, by evaporation under UHV conditions on glass substrates maintained at 300 K. The magnetic properties of Ni/Pt multilayers are examined as a function of Ni layer thickness t Ni . The temperature dependence of the spontaneous magnetization M ( T ) is well described by a T 3/2 law in all multilayers. A spin-wave theory has been used to explain the temperature dependence of the magnetization and the approximate values for the bulk exchange interaction J b , surface exchange interaction J S and the interlayer coupling strength J I for various Ni layer thicknesses have been obtained.