Measurements of the magnetic circular dichroism of the vibrationally induced transition 4Azg(F) -+ 4Tlg(P) in Coz+ doped CdF, crystals a t temperatures from 2.5 to 300 K and a t magnetic fields up to 52 kOe are reported. The measured line shape of the magnetic circular dichroism qualitatively corresponds to that calculated by Cho for the Jahn-Teller effect of the IAlg(S) + lTl,(P) transition. Therefore, we give support to the explanation of the structure of this absorption band due t o a Jahn-Teller effect. The method of moments of Henry, Schnatterly, and Slichter is extended to vibrationally induced transitions. Assuming that vibrations belonging to one irreducible representation dominate, a reduced spin-orbit coupling constant of A' = (70 f 10) cm-1 is found for the 4T1 g(P) state.
Es wird uber Messungen des magnetischen Zirkulardichroismus an dem schwingungserlaubten ubergang 4A2 g(F)+