The exact thermodynamic equations of the Kondo model are solved in the scaling regime and the impurity magnetization, susceptibility, and specific-heat curves are obtained as functions of the temperature for different magnetic fields. This is done for the case where the impurity has spin ½, 1 and $\frac{3}{2}$.

• Received 8 April 1982

DOI:https://doi.org/10.1103/PhysRevLett.49.497