Optical studies of Cr${}^{3+}$-Cr${}^{2+}$ pair center in KZnF${}_3$ crystal

M. V. Eremin, S. I. Nikitin, S. Yu. Prosvirnin +2

Optical absorption spectra of Cr${}^{3+}$-Cr${}^{2+}$ pair center in KZnF${}_3$:Cr${}^{3+}$,Cr${}^{2+}$ crystal were investigated in wide temperature range. Broad band at 30800 cm${}^{-1}$ i…