Paramagneticferromagnetic transition in a doubleexchange model
Abstract
We study paramagnetic  ferromagnetic transition due to exchange interaction between classical localized magnetic moments and conduction electrons. We formulate the Dynamical Mean Field Approximation equations for arbitrary electron dispersion law, concentration and relation between exchange coupling and the electron band width. Solving these equations we find explicit formula for the transition temperature $T_c$. We present the results of calculations of the $T_c$ for the semicircular electron density of states.
 Publication:

arXiv eprints
 Pub Date:
 December 2002
 arXiv:
 arXiv:condmat/0212450
 Bibcode:
 2002cond.mat.12450K
 Keywords:

 Condensed Matter  Statistical Mechanics
 EPrint:
 4 pages, latex, 1 eps figure