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28 March 2024
 
  » arxiv » physics/0407131

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Statistical-mechanical theory of the overall magnetic properties of mesocrystals
J. P. Huang ;
Date 25 Jul 2004
Journal Phys. Rev. E 70, 041403 (2004)
Subject Computational Physics; Statistical Mechanics | physics.comp-ph cond-mat.stat-mech
AbstractThe mesocrystal showing both electrorheological and magnetorheological effects is called electro-magnetorheological (EMR) solids. Prediction of the overall magnetic properties of the EMR solids is a challenging task due to the coexistence of the uniaxially anisotropic behavior and structural transition as well as long-range interaction between the suspended particles. To consider the uniaxial anisotropy effect, we present an anisotropic Kirkwood-Fröhlich equation for calculating the effective permeabilities by adopting an explicit characteristic spheroid rather than a characteristic sphere used in the derivation of the usual Kirkwood-Fröhlich equation. Further, by applying an Ewald-Kornfeld formulation we are able to investigate the effective permeability by including the structural transition and long-range interaction explicitly. Our theory can reduce to the usual Kirkwood-Fröhlich equation and Onsager equation naturally. To this end, the numerical simulation shows the validity of monitoring the structure of EMR solids by detecting their effective permeabilities.
Source arXiv, physics/0407131
Other source [GID 60030] pmid15600404
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