Low Temperature Magnetic Properties of the Double Exchange Model

Preprint

20 June 1996

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9606148

Abstract

We study the {\it ferromagnetic} (FM) Kondo lattice model in the strong coupling limit (double exchange (DE) model). The DE mechanism proposed by Zener to explain ferromagnetism has unexpected properties when there is more than one itinerant electron. We find that, in general, the many-body ground state of the DE model is {\it not} globally FM ordered (except for special filled-shell cases). Also, the low energy excitations of this model are distinct from spin wave excitations in usual Heisenberg ferromagnets, which will result in unusual dynamic magnetic properties.

Keywords

TEMPERATURE MAGNETIC
MAGNETIC PROPERTIES
DYNAMIC MAGNETIC
DOUBLE EXCHANGE
EXCHANGE MODEL
FERROMAGNETISM
KONDO LATTICE
PROPERTIES
SPIN WAVE

All Related Versions

Version 1, 1996-06-20, ArXiv
Published version: Journal of Physics: Condensed Matter, 9 (11), L157.

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