Ferromagnetic transition in a double-exchange system containing impurities in the Dynamical Mean Field Approximation

Details Ferromagnetic transition in a double-exchange system containing impurities in the Dynamical Mean Field Approximation Ferromagnetic transition in a double-exchange system containing impurities in the Dynamical Mean Field Approximation

2001-11-26

arxiv.org/abs/cond-mat/0111491v4

Physics

Condensed Matter

Statistical Mechanics

5 pages, latex, 2 eps figures. We explicitely present the magnetic phase diagram of the system

Scientific paper

10.1209/epl/i2002-00238-x

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.

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