Raman Spectroscopy of Polycrystalline α - MnSe

Polycrystalline -MnSe samples are investigated by Raman and photoluminescence spectroscopy. We assigned the first and the second order phonons in Raman spectra by a help of rigid ion model calculations. Several modes connected with spin system, whose width and frequencies depend on temperature, are assigned, too. Photoluminescence in -MnSe shows a steplike shift of emission bands below TN, in correlation with the antiferromagnetic spin-ordering in this material.