Abstract
Magneto-optical microscope utilizing polarization modulation technique was developed to obtain magnetooptical (MO) images involving quantities of MO effects, such as Faraday rotation and ellipticity. Faraday rotation images were calculated 'from three images taken with a linear polarized light and circularly polarized lights with left and right rotation. Square dots pattern of Y2BiFe4GaO12 film with a dimension of 50μm × 50μm and a thickness of 200 nm were measured as a sample, and the magnetic contrast was clearly observed in images of both Faraday rotation and ellipticity at wavelength. The quantitative value of the Faraday rotation and the ellipticity were measured to be 0.5° and 0.15°, respectively. Resolution of the Faraday image was obtained to be less than 0.05° by taking an integration of images and a smoothing treatment.
