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Title: Effect of interdot separation on collective magnonic modes in Chains of rectangular dots
Authors: Zivieri, R.
Montoncello, F.
Giovannini, L.
Nizzoli, F.
Tacchi, S.
Madami, M.
Gubbiotti, G.
Carlotti, G.
Adeyeye, A.O. 
Keywords: Brillouin light scattering
magnetic confinement
magnetic materials
magnonic crystals
Issue Date: Jun-2011
Citation: Zivieri, R., Montoncello, F., Giovannini, L., Nizzoli, F., Tacchi, S., Madami, M., Gubbiotti, G., Carlotti, G., Adeyeye, A.O. (2011-06). Effect of interdot separation on collective magnonic modes in Chains of rectangular dots. IEEE Transactions on Magnetics 47 (6 PART 1) : 1563-1566. ScholarBank@NUS Repository.
Abstract: The behavior of collective spin excitations in chains of rectangular NiFe dots is studied as a function of interdot separation. Dots have thickness of 40 nm and lateral dimensions of 715× 4502. They are put side by side along the major axis and the interdot separation is varied in the range 55625 nm. Brillouin light scattering experiments have been performed at normal incidence (exchanged wave vector q=0 and with the external magnetic field applied along the chain length. A satisfactory interpretation of the experimental data is achieved by magnonic bands calculations based on the dynamical matrix method. Such calculations have been performed at both the center and the border of the first Brillouin zone, in the case of Bloch wave vector q parallel to the applied field. In this way we can predict the amplitude of modes frequency oscillation (magnonic band), which is an important property to identify the behavior of a one-dimensional magnonic meta-material. © 2011 IEEE.
Source Title: IEEE Transactions on Magnetics
ISSN: 00189464
DOI: 10.1109/TMAG.2010.2098857
Appears in Collections:Staff Publications

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