Antiferromagnetic resonance (AFMR) measurements on a well characterized sin
gle crystal sample of MnF2 have been performed using various kinds of milli
meter and submillimeter sources up to 570 GHz and a superconducting magnet
up to 20 T. AU the AFMR modes predicted from the theory have been observed.
We report a complete frequency-field chart for these AFMR modes.