Brillouin-zone mapping of the spin waves in a ferromagnetic bilayer system

W. P. Zhou (), G. H. Yun () and X. X. Liang

The European Physical Journal B: Condensed Matter and Complex Systems, 2007, vol. 55, issue 1, 37-42

Abstract: The eigenproblems of spin waves in a heterogeneous ferromagnetic bilayer system with periodic boundary conditions are solved using the interface-rescaling approach. Brillouin zone mapping and the eigenmodes of the system are investigated. We find three types of spin waves may exist in the system: the bulk mode, the interface mode, and the perfect confined mode. The fine structure of the energy band in the heterogeneous bilayer system is first given for the whole two-dimensional Brillouin zone. Conditions for the existence of the interface mode are discussed. Finally, we analyze the resonant-confined spin waves in bulk modes and their oscillating behavior. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Keywords: 75.30.Ds Spin waves (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1140/epjb/e2007-00039-1

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