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Magnetic excitations in (SiO2)Co nano-composite films: Brillouin light scattering study |
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| Authors: | A.A. Stashkevich,Y. Roussigné ,N.I. Novitskii,A.V. Zayats,G. Chaboussant,L.V. Lutsev,M.P. Kostylev |
| Affiliation: | a LPMTM CNRS (UPR 9001), Université Paris 13, 93430 Villetaneuse, France b Institute of Solid State and Semiconductor Physics, 220072 Minsk, Belarus c Centre for Nanostructured Media, IRCEP, The Queen's University Belfast, BT7 1NN, UK d ITODYS CNRS (UMR 7086),Université Paris 7, 75251 Paris, France e Laboratoire Léon Brillouin (LLB-CNRS-CEA) CEA Saclay, 91191 France f Research Institute ‘Ferrite-Domen’, 196084 Saint-Petersburg, Russia g School of Physics-M013, University of Western Australia, Crawley, WA 6009, Australia h Moscow State University, 119992 Moscow, Russia |
| Abstract: | Behaviour of magnetic excitations in the Damon-Eshbach (DE) and backward volume (BV) geometries in nano-composite (SiO2)100−xCox (50% at<x<80% at) films has been studied by Brillouin light scattering (BLS). It has been shown that it is the structure of Stokes/anti-Stokes BLS lines in the DE geometry that allows reliable identification of dipole-exchange spin waves (SW) and numerical estimation of the value of the effective exchange constant Aeff of a super-ferromagnetic nano-granular sample (x=80% at). |
| Keywords: | 75.30.Ds 75.50.&minus y 78.35.+c |
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