Theory of spin waves in a ferromagnetic Kondo lattice model

Journal Article · Wed Apr 01 00:00:00 EST 1998 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.57.7427· OSTI ID:625868

Wang, X ^[1]

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1. Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee37831-6114 (United States)

A random-phase approximation theory for spin waves in a ferromagnetic Kondo lattice model is presented. In the strong-coupling limit, this theory agrees with the existing theoretical results, in which the magnetic coupling is taken to be infinite {ital a priori}. It is shown explicitly that, in the strong-coupling limit, the spin-wave spectrum of the system is identical to that of a short-range Heisenberg model for the case of a single conduction band with short-range hopping integrals. In the intermediate coupling regime, on the other hand, more complicated effects, such as softening or disappearance of spin waves, are likely to be observed. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 625868
• Journal Information: Physical Review, B: Condensed Matter, Vol. 57, Issue 13; Other Information: PBD: Apr 1998
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
KONDO EFFECT
SPIN WAVES
FERROMAGNETIC MATERIALS
FERROMAGNETISM
HEISENBERG MODEL
RANDOM PHASE APPROXIMATION
ANALYTICAL SOLUTION
INTERMEDIATE COUPLING
STRONG-COUPLING MODEL
MAGNETIC PROPERTIES