Convenient Spectrum Measurement of Magnetooptic Faraday Effect Utilizing Off-Crossed Polarization

Abstract
A convenient measurement of the magnetooptic Faraday spectra, i.e., the Faraday rotation angle θ F and Faraday ellipticity χ F vs wavelength, is presented based on ellipsometry in which the polarizer and analyzer are set in an off-crossed polarization state. This system is suitable for full computerization, enabling us to achieve efficiency in measurement without loss of accuracy. A very good agreement of the spectra between the present method and an ordinary crossed polarization method was found using a bismuth-substituted yttrirnm-iron-garnet film.