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Crystal fields and Kondo effect: Magnetic susceptibility of Cerium ions in axial crystal fields

“…The Bethe ansatz solution of the Coqblin-Schrieffer model [14,15] was used by Schlottmann [16] to calculate the anisotropic magnetic susceptibility at zero temperature for the ionic crystal field Hamiltonian given by [16,17]:…”

“…( 2) have to be put into sequence such that Ar ≥ 0. For reasons of brevity we restrict ourselves to the case E1/2 < E3/2 < E5/2, region II in the notation of Schlottmann [16]. The extrapolation of our results to zero temperature has served as a check on our calculation for A2 = A4.…”