Journal ArticleDOI
Random anisotropy Blume-Emery-Griffiths model.
TLDR
The results are described of studies of a random-anisotropy Blume-Emery-Griffiths spin-1 Ising model using mean-field theory, transfer-matrix calculations, and position-space renormalization-group calculations that lead to a rich phase diagram with a variety of phase transitions and reentrant behavior.Abstract:
The results are described of studies of a random-anisotropy Blume-Emery-Griffiths spin-1 Ising model using mean-field theory, transfer-matrix calculations, and position-space renormalization-group calculations. The interplay between the quenched randomness of the anisotropy and the annealed disorder introduced by the spin-1 model leads to a rich phase diagram with a variety of phase transitions and reentrant behavior. The results may be relevant to the study of the phase separation of He-3 - He-4 mixtures in porous media in the vicinity of the superfluid transition.read more
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Journal ArticleDOI
Phase separation in confined systems
TL;DR: A review of the current state of knowledge of phase separation and phase equilibria in porous materials can be found in this article, where the focus is on fundamental studies of simple fluids and well-characterized materials.
Journal ArticleDOI
Helium in Aerogel
TL;DR: In this paper, the effect of randomness and disorder on condensed phases of matter is discussed and a special issue of PHYSICS TODAY dedicated to disordered solids is devoted to the topic.
Journal ArticleDOI
A cluster variation approach to the random-anisotropy Blume-Emery-Griffiths model
TL;DR: In this article, the random-anisotropy Blume-Emery-Griffiths model, which has been proposed to describe the critical behaviour of 3He-4He mixtures in a porous medium, is studied in the pair approximation of the cluster variation method extended to disordered systems.
Journal ArticleDOI
The Effect of a Random Crystal-Field on the Mixed Ising Spins (1/2, 3/2)
Journal ArticleDOI
Mean field study of the mixed Ising model in a random crystal field
TL;DR: In this article, the magnetic properties of a mixed Ising ferrimagnetic system, in which the two interacting sublattices have spins σ, ( ± 1 / 2 ) and spins S, (± 1, 0 ) in the presence of a random crystal field, have been studied with the mean field approach.
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