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Collective spin modes in monodimensional magnonic crystals consisting of dipolarly coupled nanowires

Gubbiotti, G.
Tacchi, S.
Carlotti, G.
Singh, N.
Goolaup, S.Adeyeye, A.O.
Kostylev, M.
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Abstract
Magnetization dynamics of dipolarly coupled nanowire arrays has been studied by Brillouin light scattering. Measurements performed in uniformly magnetized wires as a function of the transferred wave vector demonstrated the existence of several discrete collective modes, propagating through the structure with a periodic dispersion curve encompassing several Brillouin zones relative to the artificial spatial periodicity. This experimental evidence has been quantitatively explained by a theoretical model which permits the calculation of the dispersion relation for collective modes in patterned arrays through the numerical solution of an eigenvalue problem for an integral operator. © 2007 American Institute of Physics.
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Source Title
Applied Physics Letters
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Date
2007
DOI
10.1063/1.2709909
Type
Article
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