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- Title
Ferromagnetic phases in spin-Fermion systems.
- Authors
Karchev, N.
- Abstract
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 ferromagnetic phases in the system: low temperature phase 0 < T < T*, where all electrons contribute the ordered ferromagnetic moment, and high temperature phase T* < T < T, where only localized spins form magnetic moment. The magnetization as a function of temperature is calculated. The theoretical predictions are utilize to interpret the experimentally measured magnetization-temperature curves of UGe.
- Subjects
FERMIONS; PARTICLES (Nuclear physics); MAGNETIC properties; ELECTRONS; SPIN waves
- Publication
European Physical Journal B: Condensed Matter, 2010, Vol 77, Issue 1, p47
- ISSN
1434-6028
- Publication type
Article
- DOI
10.1140/epjb/e2010-00249-4