Magnons in the Ferromagnetic Kondo-Lattice Model

✍ Scribed by M. Vogt; C. Santos; W. Nolting

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 161 KB
• Volume: 223
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/1521-3951(200102)223:3<679::aid-pssb679>3.0.co;2-p

✦ Synopsis

The magnetic properties of the ferromagnetic Kondo-lattice model (FKLM) are investigated. Starting from an analysis of the magnon spectrum in the spin-wave regime, we examine the ferromagnetic stability as a function of the occupation of the conduction band n and the strength J of the coupling between the localised moments and the conduction electrons. From the properties of the spin-wave stiffness D the ferromagnetic phase at zero temperature is derived. Using an approximate formula the critical temperature T c is calculated as a function of J and n.