OPTICAL PROPERTY INFLUENCE ON MAGNETOOPTICS OF CONI AND TBCO MULTILAYERS ON NOBLE-METAL ALLOY SUBSTRATES

Spectroscopic (300-800 nm) magneto-optic measurements (polar Kerr rota tion and ellipticity), as well as spectroscopic (250-1000 nm) ellipsom etric measurements have been taken on a series of CoNi and TbCo multil ayer nanostructures. The magnetic layers were sputter deposited onto A uxAg1-x alloy buffer layers (a range of x values were used) which were sputtered onto glass substrates. An interesting maxima in the Kerr ro tation, appearing in the mid-visible region, shifts toward the blue wi th decreasing x values. A full electromagnetic analysis of this multil ayer boundary value problem, including dielectric function representat ion for all constituent layers permits an understanding,of the spectra l data, and allows prediction of interesting new observable optic and magneto-optic phenomena.