Ferromagnetic transition in a double-exchange system containing impurities in the Dynamical Mean Field Approximation
Statistical Mechanics
2009-11-07 v4
Abstract
We formulate the Dynamical Mean Field Approximation equations for the double-exchange system with quenched disorder for arbitrary relation between Hund exchange coupling and electron band width. Close to the ferromagnetic-paramagnetic transition point the DMFA equations can be reduced to the ordinary mean field equation of Curie-Weiss type. We solve the equation to find the transition temperature and present the magnetic phase diagram of the system.
Keywords
Cite
@article{arxiv.cond-mat/0111491,
title = {Ferromagnetic transition in a double-exchange system containing impurities in the Dynamical Mean Field Approximation},
author = {Mark Auslender and Eugene Kogan},
journal= {arXiv preprint arXiv:cond-mat/0111491},
year = {2009}
}
Comments
5 pages, latex, 2 eps figures. We explicitely present the magnetic phase diagram of the system