  The magneto-optical properties of simple hexagonal graphite exhibit rich
beating oscillations, which are dominated by the field strength and photon
energy. The former has a strong effect on the intensity, the energy range of
the beating and the number of groups, and the latter modulates the total group
numbers of the oscillation structures. The single-particle and collective
excitations are simultaneously presented in the magnetoreflectance spectra and
can be precisely distinguished. For the loss function and reflectance, the
beating pattern of the first group displays stronger intensities and broader
energy range than other groups. Simple hexagonal graphite possesses unique
magneto-optical characteristics that can serve to identify other bulk
graphites.
