Tn. Antsygina et Va. Slyusarev, THERMODYNAMICS OF THE 2-DIMENSIONAL HEISENBERG-FERROMAGNET IN THE FRAMEWORK OF THE RENORMALIZATION-GROUP APPROACH, Theoretical and mathematical physics, 104(3), 1995, pp. 1178-1183
A method of describing the thermodynamic functions of two-dimensional
isotropic Heisenberg ferromagnets based on a generalization of the 2 epsilon expansion is proposed. Interpolation formulas constructed in
the framework of this approach make possible a smooth passage to the r
esults obtained by the methods of high-temperature expansions.