Zn_1‑x‑yBe_xMn_ySe is promising for spintronics as a spin filter layer with possible applications in memory technology. This work deals with photoluminescence (PL), Raman and EPR studies of bulk Zn_1-x-yBe_xMn_ySe grown by Bridgman method. The contents of Be and Mn were varied from 0.0 to 0.2. PL spectra were measured in the temperature range from 30K to RT. EPR studies were made with EPR spectrometer working at X‑band. PL spectra at low temperatures of Zn_1-x-yBe_xMn_ySe with Be content 5% and Mn content not higher than 20% consist of exciton line, shallow donor-acceptor emission and yellow luminescence band positioned at the energy about 2.05 eV associated with Mn ions. For larger concentration of beryllium only yellow emission is observed at temperatures from 35K to room temperature. The photoluminescence-excitation spectra, when the emission is detected at 2.05 eV, consist of four clearly resolved components interpreted as due to transitions from the ground ⁶A₁(⁶S) state of Mn to different excited states associated with crystal field splitting. From PL measurements the slight increasing of the excitonic energy gap with increasing of Mn content was observed in the investigated range of composition, in contrast to ZnMnSe.
The room temperature Raman spectra consist of ZnSe-like, MnSe-like and BeSe-like transverse and longitudinal modes. Because of the phonon energies in ZnSe and MnSe do not differ so much, the respective Raman lines are overlapped. EPR measurements show that Mn content in Zn_1-x-yBe_xMn_ySe samples influences the amplitude of the EPR signal, the lineshape and the line position, directly related to the g‑factor value. Applying the DPPH as a standard, the Mn content per sample weight unit was estimated.

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1. Lattice parameters of a wurtzite-type (Zn,Mg)Se crystal as a function of temperature
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3. Photoelectric and Photothermal Investigations of Zn_1-x-yBe_xMn_ySe Solid Solutions