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Brillouin Light Scattering Study of Spin Waves of Ni and Co Films

Published online by Cambridge University Press:  15 February 2011

J.M.V. Ngaboyisonga ,
O. Donzelli ,
F. Nizzoli ,
G. Canotti ,
G. Gubbiotti ,
L. Pareti  and
G. Tonili
J.M.V. Ngaboyisonga
Affiliation:
INFM and Department of Physics, University of Ferrara, 44100 Ferrara, Italy
O. Donzelli
Affiliation:
INFM and Department of Physics, University of Ferrara, 44100 Ferrara, Italy
F. Nizzoli
Affiliation:
INFM and Department of Physics, University of Ferrara, 44100 Ferrara, Italy
G. Canotti
Affiliation:
INFM and Department of Physics, University of Perugia, 06100 Perugia, Italy
G. Gubbiotti
Affiliation:
INFM and Department of Physics, University of Perugia, 06100 Perugia, Italy
L. Pareti
Affiliation:
Consiglio Nazionale delle Ricerche, MASPEC Institute, 43100 Parma, Italy
G. Tonili
Affiliation:
Consiglio Nazionale delle Ricerche, MASPEC Institute, 43100 Parma, Italy
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Abstract

Thin films of Ni and Co have been investigated by Brillouin Light Scattering (BLS). The samples, grown by evaporation (Ni) and RF sputtering (Co) on silicon substrates, have thicknesses in the range 16–98 nm. The Damon-Eshbach surface mode and several bulk standing waves have been detected. A macroscopic approach has been adopted in order to calculate the dispersion relations of the spin waves. The method takes into account the dipolar and exchange interactions, together with bulk and surface magnetic anisotropies. The spin waves frequencies and the scattering cross section have been calculated by using the bulk and surface anisotropies as relevant fitting parameters.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 475: Symposium M – Magnetic Ultrathin Films, Multilayers, and Surfaces – 1997 , 1997 , 345
Copyright
Copyright © Materials Research Society 1997

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References

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