Ferromagnetic phases in spin-Fermion systems

Details Ferromagnetic phases in spin-Fermion systems Ferromagnetic phases in spin-Fermion systems

2010-08-06

arxiv.org/abs/1008.1148v1

Eur. Phys. J. B 77, 44 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, 5 figures

Scientific paper

Spin-Fermion systems which obtain their magnetic properties from a system of localized magnetic moments being coupled to conducting electrons are considered. The dynamical degrees of freedom are spin-$s$ operators of localized spins and spin-1/2 Fermi operators of itinerant electrons. Renormalized spin-wave theory, which accounts for the magnon-magnon interaction, and its extension are developed to describe the two ferrimagnetic phases in the system: low temperature phase $0

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