Transverse and polar Kerr effects and quadratic magnetooptical effect in reflected light have been discovered and studied in antiferromagnetic chromium. Measurements have been performed in IR, visible, and UV ranges of spectrum in a magnetic field H = 10 kOe. The frequency dispersion of the off-diagonal component of the dielectric constant tensor of chromium has been determined for the first time. An analysis of the magnetooptical data obtained is carried out on the basis of available data on the electronic structure of chromium.
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