The re-examined phenomenological phase transitions theory for ferromagnets

Abstract

The existence of the linear on the order parameter term of the thermodynamic functions expansion near the critical point is justified. The criticism of the arguments, used for the rejection of the odd-power expansion terms of the ferromagnets thermodynamic functions is presented. It is shown, that taking into account the linear term in expansion one achieves the consentency with experimental data on the magnetization behavior near the transition temperature in ferromagnets.