Luminescence of antiferromagnetic manganese fluoride at high excitation levels
V. P. DokashenkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kovV. V. EremenkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kovÉ. V. MatyushkinPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kovV. I. SmushkovPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kov
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We have studied the luminescence of an MnF2 crystal excited by a powerful copper vapor laser. The E1 luminescence band is observed to shift toward the red region of the spectrum and the exciton luminescence yield decreases at a high level of excitation. The results are explained as a manifestation of exciton-exciton interaction when their concentration is large.
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