MAGNETO-OPTIC KERR EFFECT IN Fe-Ni ALLOYS

The polar Kerr rotation (1.5∼5.5eV) and the reflectivity (1.4∼6.2eV) in for Fe-Ni alloys of different composition were measured and the optical constants and the Kerr ellipticity were estimated by Kramers-Kronig analysis. The Kerr effect of the alloys was briefly discussed in connection with the off-diagonal element of the dielectric tensor.