Fig. 2.
A) Field-dependence of MCD signal at LT. B) Saturation magnetization for an S = 1/2 Kramers doublet with signal plotted as a function of H/T. Inset shows Kramers doublet ground and excited states in a magnetic field and the two allowed MCD transitions between these states. C) Nested saturation magnetization isotherms for S = 2 non-Kramers system. D) Energy splitting diagram of a negative zero-field split S = 2 non-Kramers system depicting axial, rhombic and magnetic field splittings. Note that the |+2> and |−2> wavefunctions equally mix at zero magnetic field and then change to pure |+2> and |−2> at high field. E) LF splitting diagram for 5T2g ground state depicting the effects of axial and rhombic distortions, spin-orbit coupling (+ s.o.) and magnetic field Zeeman splittings. Adapted from Ref. 2.