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

M. Auslender; E. Kogan

doi:10.1209/epl/i2002-00238-x

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

M. Auslender
, E. Kogan

Department of Physics - at Bar-Ilan University

Ben-Gurion University of the Negev

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

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 bandwidth. 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.

Original language	English
Pages (from-to)	277-283
Number of pages	7
Journal	Europhysics Letters
Volume	59
Issue number	2
DOIs	https://doi.org/10.1209/epl/i2002-00238-x
State	Published - 2002

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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 bandwidth. 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.",

author = "M. Auslender and E. Kogan",

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

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