摘要
The effect of Cu doping in Pt spacer layers on the magneto-optical properties of sputtered Pt/Co multilayers has been investigated.It was found that the polar Kerr rotationθk,ellipticityεk,refractive index n and absorptive index k show an oscillation behavior as a function of the Cu content x,reflective index R keeps almost constant with the decreasing wavelengthλ,threeθk peaks appear at x=0.03,0.12,0.25,respectively.Values of conductivity tensorσ1xx,σ_(2xx),σ_(1xy),andσ_(2xy) in the PtCu layers have been derived from experimentalθ_(k),ε_(k),n,and k values at wavelength 770nm.The oscillation of the polar Kerr rotationθ_(k) may be resulted from spin polarized quantum size effects in the PtCu layers.
基金
Supported by the Beijing Natural Science Foundation under Grant No.1962003.
