Magnetic excitations in (SiO 2)Co nano-composite films: Brillouin light scattering study

• Published in: Journal of magnetism and magnetic materials Vol. 321; no. 7; pp. 876 - 879
• Main Authors: Stashkevich, A.A., Roussigné, Y., Stognij, A.I., Novitskii, N.I., Wurtz, G., Zayats, A.V., Viau, G., Chaboussant, G., Ott, F., Lutsev, L.V., Djemia, P., Kostylev, M.P., Belotelov, V.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.04.2009
• Subjects: Brillouin spectroscopy; Nanostructures; Spin waves; Spin waves; Nanostructures; 78.35.+c; Brillouin spectroscopy; 75.50.−y; 75.30.Ds
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2008.11.061

Behaviour of magnetic excitations in the Damon–Eshbach (DE) and backward volume (BV) geometries in nano-composite (SiO 2) 100− x Co x (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 A eff of a super-ferromagnetic nano-granular sample ( x=80% at).