Abstract
The critical behavior of a classical Heisenberg ferromagnet is studied in the limit where the spin dimensionality is large. Corrections of order to the spherical model are obtained as functions of a continuous dimension , . Particular attention is given to the behavior near the coexistence curve. The divergence of the magnetic susceptibility below as the external field vanishes is discussed through a nonlinear realization of the symmetry, as well as in the and expansions.
- Received 31 July 1972
DOI:https://doi.org/10.1103/PhysRevB.7.1967
©1973 American Physical Society