  We experimentally demonstrate that in magnetostrictive ferrimagnetic single
crystal of CoFe2O4 there is clear correlation between magnetostriction and
magnetoreflection of unpolarized light in the infrared range. The influence of
magnetic field on specular reflection is likely to be indirect: application of
a magnetic field results in strong strain and deformation of the crystal
lattice, which leads to the change in electron energy structure and hence
reflection spectrum.
