Exciton luminescence in orthorhombic-structure MnF2 epitaxial films

N. S. Sokolov, O. V. Anisimov, A. G. Banshchikov, S. V. Gastev, C. Dyroff, R. J. Reeves, X. Wang, W. M. Yen

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Abstract

The low-temperature photoluminescence (PL) of 100 to 300-nm thick MnF2 epitaxial films of the α-PbO2-type orthorhombic structure was studied. The PL spectrum consists mainly of a broad band peaking around 575 nm and a slowly decaying long-wavelength wing. The short-wavelength part of the main band revealed relatively weak spectral features, which are due to magnon replicas of the Mn2+ excitonic line perturbed by Mg and Ca impurities. These features were found to shift toward shorter wavelengths by 12 nm relative to their position in bulk MnF2 crystals. The shift can be accounted for by a change in the crystal field acting on the Mn2+ ions in the orthorhombic phase.

Original languageEnglish
Pages (from-to)1455-1458
Number of pages4
JournalPhysics of the Solid State
Volume44
Issue number8
DOIs
StatePublished - Aug 1 2002

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