Spin-wave theory of double-exchange magnets

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An isotropic half-metallic double-exchange magnet with a direct superexchange coupling between the localized spins is studied within the spin-wave (1/S) expansion. The momentum dependence of the spin-wave spectrum (including quantum corrections) in the ferromagnetic phase at T=0 is investigated. Based on the calculated spin-wave spectrum of the canted state, it is shown that as long as the external magnetic field is not too strong, the double exchange-superexchange competition does not result in a stabilization of a two-sublattice canted spin ordering.

Original languageEnglish
Pages (from-to)5804-5806
Number of pages3
JournalJournal of Applied Physics
Issue number9 II
StatePublished - May 2000
Externally publishedYes
Event44th Annual Conference on Magnetism and Magnetic Materials - San Jose, CA, United States
Duration: 15 Nov 199918 Nov 1999


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