Berlin 2005 – wissenschaftliches Programm
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MA: Magnetismus
MA 20: Poster:Schichten(1-29),Spintrsp(30-45),Ex-Bias(46-63),Spindyn(64-75),Mikromat.(76-80),Cluster(81-94),Abbv.(95-99),Obflm(100-02),SpElek.(103-09),E-Theo(110-14),Mikromag.(115-16),Spin+PÜ(117-26),Mag.Mat.(127-51),Meth.(152-55),Mol.Mag(156-59),Kondo(160-65
MA 20.71: Poster
Montag, 7. März 2005, 14:00–18:00, Poster TU C
Magnetic excitations in finite rectangular elements — •C. Bayer1, J. Jorzick1, H. Schultheiss1, B. Hillebrands1, S.O. Demokritov2, A.N. Slavin3, K. Guslienko4, and M.P. Kostylev5 — 1Fachbereich Physik and Forschungsschwerpunkt MINAS, Technische Universität Kaiserslautern, Germany — 2Institut für Angewandte Physik, Westfälische Wilhelms-Universität Münster, Germany — 3Department of Physics, Oakland University, Rochester, Michigan 48309, USA — 4Materials Science Division, Argonne National Laboratory, Argonne, USA — 5St. Petersburg Electrotechnical University, 197376 St. Petersburg, Russia
We report on progress in the understanding of spin-wave modes in arrays of micron-size magnetic Ni80Fe20 stripes and rectangular elements. Several effects caused by the lateral confinement in the stripes are investigated using Brillouin light scattering: (i) lateral quantization of dipole-dominated Damon-Eshbach spin-wave modes in a longitudinally magnetized stripe due to its finite width, (ii) localization of exchange-dominated spin wave modes near the edges and dipole-dominated spin wave modes near the center of a transversely magnetized long magnetic stripe due to the inhomogeneity of its internal magnetic field, (iii) combination of quantization and localization effects for the spin wave modes in rectangular elements. The observed effects are analyzed theoretically using an analytical approach as well as numerical simulations. From the comparison of the latest experimental findings with the results of new calculations the mode spectrum of rectangular elements can now be described quantitatively with very good accuracy .