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MA: Fachverband Magnetismus

MA 15: Poster:ThinFilms(1-33),Transp.(34-49),ExchBias(50-56),
Spindynamics(57-70),Micro-nanostr.Mat.(71-82),
Particles/Clust.(83-88), Mag.Imag./Surface(89-96),
Spinelectronics(97-109), Theory/Micromag.(110-116),
Spinstruct/Phasetr.(117-128),Magn.Mat.(129-139),
Aniso.+Measuring(140-145), MolMag.(146-152),
MSMA(153-156)

MA 15.96: Poster

Dienstag, 27. März 2007, 15:00–19:00, Poster A

Thickness dependent spin wave properties in ultrathin Fe films — •Yu Zhang, Wen Xin Tang, Ioan Tudosa, Jacek Prokop, and Jürgen Kirschner — Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany

The spin wave excitations were investigated by spin polarized electron energy loss spectroscopy (SPEELS) in ultrathin epitaxial Fe/ W(110) films. In this report, the spin wave spectra vs. the thickness of Fe films on W (110) with different wave vectors are presented. The iron films, from 2 to 12 monolayers (ML) thick, are deposited using molecular beam epitaxy in ultra high vacuum at room temperature. The spin wave peaks appear clearly in the spectra of 2 ML Fe films, however for thicker films (≥4 ML), the spin-wave excitations show broad peaks in the spectra, and it is difficult to extract the dispersion relation. The reason for obscuring the spin-wave dispersion for the thicker films will be discussed according to the increase of film thicknesses. The obtained results are also compared and discussed with calculations known from the literature.