Regensburg 2007 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 28: Surface Magnetism

MA 28.10: Vortrag

Donnerstag, 29. März 2007, 17:30–17:45, H23

Growth and Magnetism of Fe on vicinal Au(111) — •Tobias Allmers and Markus Donath — Physics Institute, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster

We investigated the growth and the magnetism of Fe on the Au(11 12 12) surface, which is vicinal to Au(111), by scanning tunnelling microscopy, spin- and angle-resolved photoemission and magneto-optical Kerr effect (MOKE). We observe the same growth behavior as on Au(788) in the range between 0.02 and 0.3 monolayers (ML) which has been investigated by Shiraki et al. [1]. The terraces are wider on Au(11 12 12) then on Au(788) but the reconstruction pattern is the same [2]. For higher coverage, the film topography shows similarities to Fe films grown on a vicinal Cu(111) surface [3]. In our MOKE investigations performed at 160 K we found that the paramagnetic limit of Fe on vicinal Au(111) is reached for a film thickness below 2 ML. We deduced the inelastic mean free path (IMFP) for Fe by photoemission. Our result is in agreement with other measurements for Fe on different substrates but disagrees with measurements on Au(788) [4]. In addition, we studied the magnetic 3d bands of Fe.
[1] S. Shiraki et al., Appl. Surf. Science 237, 284 (2004)
[2] S. Rousset et al., J. Phys. Condens. Matter 15, S3363 (2003).
[3] J. Shen et al., Phys. Rev. B 56, 11134 (1997)
[4] H. Fujisawa et al., Surf. Interface Anal. 37, 124 (2005)