Quadratic Magneto-Optic Effects in Reflection from Uniaxial Crystals

Quadratic or second-order magneto-optic effects in reflection significantly affect magneto-optic vector magnetometry and magneto-optic ellipsometry measurements. Theoretical formulae for the magneto-optic effects in uniaxial crystals as a function of crystal rotation have been derived including quadratic terms in a permittivity tensor. Anisotropy phenomena of the quadratic MO effects enable to distinguish among main crystal symmetries. Method for measurement and evaluation of the quadratic MO parameters has been proposed.