J. Phys. IV France 08 (1998) Pr2-327-Pr2-330
Static and dynamic properties of ferromagnetic thin films with stripe domain structureD. Pain1, O. Acher1, D. Damiani1, C. Boscher1, N. Vukadinovic2 and H. Niedoba3
1 DMAT/CF/MMH, CEA Le Ripault, BP. 16, 37260 Monts, France
2 Dassault Aviation, 92552 Saint-Cloud cedex, France
3 CNRS, Laboratoire de Magnétisme et d'Optique de Versailles, 78035 Versailles cedex, France
We investigate the properties of ferromagnetic films deposited by magnetron sputtering, with a stripe domain structure. The domain structure is visualized by Kerr microscopy. We propose a model based on the minimization of a free energy of the stripe system, which allows us to fit the complete hysteresis curve. We can deduce the domain period and the magnetic parameters from the experimental hysteresis curve. We obtain a reasonable agreement on the stripe width with our observations, and with previous works. The dynamic response in the 10 MHz to 3 GHz range is also studied. The resonance frequencies are computed by the Smit and Beljers method. The calculated resonance frequencies are in good agreement with our observations.
© EDP Sciences 1998