Abstract
We report on extensive new measurements relating to the near-infrared photoluminescence of EuSe first reported by Busch and Wachter in 1966. The emission and excitation spectra are obtained as functions of temperature and external magnetic field. The total red shift is 0.13 eV in the excitation spectrum (in good agreement with the absorption-edge shift), and 0.25 eV in the emission spectrum. At 4.3°K an external magnetic field of 11 kOe quenches the yield to about 30% of its field-free value. The experimental results are discussed in relation to photoconductivity and optical absorption measurements. An intrinsic and localized model for the luminescence is proposed, in which the emission takes place by radiative recombination of a localized magnetic polaron with a hole in the europium 4f-shell.
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