Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
976680 | Physica A: Statistical Mechanics and its Applications | 2010 | 12 Pages |
Abstract
The microscopic approach to calculating the free energy of a three-dimensional Ising-like system in a homogeneous external field is developed in the higher non-Gaussian approximation (the Ï6 model) at temperatures above the critical value of Tc (Tc is the phase-transition temperature in the absence of an external field). The free energy of the system is found by separating the contributions from the short- and long-wave spin-density oscillation modes taking into account both temperature and field fluctuations of the order parameter. Our analytical calculations do not involve power series in the scaling variable and are valid in the whole field-temperature plane near the critical point including the region in the vicinity of the limiting field hÌc, which divides external fields into the weak and strong ones (i.e., the crossover region).
Related Topics
Physical Sciences and Engineering
Mathematics
Mathematical Physics
Authors
I.V. Pylyuk, M.P. Kozlovskii,