The authors calculate the dynamic susceptibility of the Anderson impurity model using a 1/Nf expansion. For Nf= infinity a Fermi liquid sum rule is satisfied, and Im chi (w) shows a steep rise at w=TK. They also include crystal-field and spin orbit splitting and treat U< infinity . The relation to parameters derived from electron spectroscopy is discussed.
 

Journal of Magnetism and Magnetic Materials, 52 227-9, 1985.