An old model for magnetic nematics
作者:
P. I. C. TEIXEIRA,
期刊:
Liquid Crystals
(Taylor Available online 1998)
卷期:
Volume 25,
issue 6
页码: 721-726
ISSN:0267-8292
年代: 1998
DOI:10.1080/026782998205732
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
A mean-field treatment is given of the off-lattice Krieger-James model of ordered fluids, which reduces to the more familiar Maier-Saupe liquid crystal (Heisenberg fluid) in the absence of ferromagnetic (nematic) interactions. As in the lattice version, isotropic, nematic and ferromagnetic nematic phases are found, but the nematic-ferronematic transition can either change order at a tricritical point, or terminate at a critical end point on the ferronematic-isotropic coexistence curve. In addition it is argued that the sequence of phase diagram topologies, as a function of the relative weights of ferromagnetic and nematic contributions to the free energy, should be similar to that obtained on varying the elongation of dipolar spheroids.
点击下载:
PDF (204KB)
返 回