Calculation of free energy of a three-dimensional Ising-like system in an external field with the use of the model

Autor:	M. P. Kozlovskii, I. V. Pylyuk
Rok vydání:	2010
Předmět:	Statistics and Probability Physics Power series Condensed matter physics Critical point (thermodynamics) Homogeneous Crossover External field Ising model Condensed Matter Physics Critical value Scaling
Zdroj:	Physica A: Statistical Mechanics and its Applications. 389:5390-5401
ISSN:	0378-4371
Popis:	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 ρ 6 model) at temperatures above the critical value of T c ( T c 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 h c , which divides external fields into the weak and strong ones (i.e., the crossover region).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1579aa68447472cbf23a3a8383f4434d https://doi.org/10.1016/j.physa.2010.08.022 Zobrazit plný text záznamu Full Text from ScienceDirect