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MA: Magnetismus

MA 20: Poster: Films(1-36) Transp(37-56) Ex.Bias(57-67) Spindyn(68-80) Micromag(81-95) Particle(96-109) Imag.+Surface(110-113) Spinelectr(114-122) Theory+Micromag(123-131) Spinstr+Aniso(132-142) MagMat(143-156) Meas(157,158) MolMag+Kondo(159-162) Postdead(163-)

MA 20.113: Poster

Dienstag, 28. März 2006, 15:15–19:15, P1

High wave vector spin waves excitation in submonolayer Fe-islands on Co/W(110) — •Y. Zhang, M. Etzkorn, W. Tang, P.S. Anil Kumar, and J. Kirschner — Max-Planck-Institut für Mikrostrukturphysik,

We investigated the surface spin waves of submonolayer Fe-islands on Co thin films on W(110) with a spin-polarized electron energy loss spectroscopy (SPEELS). Our results can be understood by two individual contributions of Co and Fe rich areas on the sample surface. We find a significant signal from about 1/4 of a monolayer of Fe, which demonstrates the high sensitivity of SPEELS especially on surface. The spin wave intensities coming from the Fe and the Co change with the coverage of Fe, while the spin wave energies remain independent. We also found no significant changes in the spin wave loss features coming from the Co part of the surface compared to the spin waves in a clean Co-film.