Soft Magnetic Materials 13

J. Phys. IV France 08 (1998) Pr2-331-Pr2-334
DOI: 10.1051/jp4:1998277

Theoretical and experimental approach to spin dynamics in thin magnetic films

C. Tannous¹, A. Fessant¹, J. Gieraltowski¹, J.P. Jay¹, D. Spenato¹, J. Langlois² and H. Le Gall<sup>3

1</sup>  Université de Bretagne Occidentale, Laboratoire d'Étude des Matériaux, 6 avenue le Gorgeu, BP. 809, 29285 Brest cedex, France
²  Université de Bretagne Occidentale, Laboratoire des Collisions Électroniques et Atomiques, 6 avenue le Gorgeu, BP. 809, 29285 Brest cedex, France
³  CNRS, LMIMS, 1 place Aristide Briand, 92195 Meudon cedex, France

Abstract
The Landau-Lifshitz (L-L) equation describing the time dependence of the magnetisation vector is numerically integrated fully without any simplifying assumptions in the time domain and the magnetisation time series obtained is Fourier transformed (FFT) to yield the permeability spectrum up to 10 GHz. The non linear results are compared to the experimental results obtained on magnetic amorphous thin films of Co-Zr, Co-Zr-Re. We analyse our results with the frequency response obtained directly from the Landau-Lifshitz equation as well as with the second order Gilbert frequency response.

© EDP Sciences 1998