“…As follows from the Tanabe-Sugano diagram for excited energy levels of the 3d ions [27], in the studied spectral range, one can expect to observe the contributions to the MCD of intra-configurational transitions, in particular, for the 3d 5 Mn 2 + and Fe 3 + ions, of the electronic transitions 6 A 1 -4 T 1 , 6 A 1 -4 T 2 , 6 A 1 -4 A 1 , 4 E in tetrahedral coordination and 6 A 1g -4 T 1g , 6 A 1g -4 T 2g , 6 A 1g -4 A 1g , 4 E g in octahedral coordination. Such transitions have indeed been observed in manganese ferrite thin films [24,26].…”