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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 15.95: Poster
Dienstag, 27. März 2007, 15:00–19:00, Poster A
Structural, electronic and magnetic properties of ultrathin epitaxial AuFe/Mo(110) films — •Andrei Kukunin1, Jacek Prokop1,2, and Hans Joachim Elmers1 — 1Johannes Gutenberg-Universität Mainz, Institut für Physik, Staudingerweg 7, D-55099 Mainz — 2Max-Planck Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle (Saale)
Structural, electronic and magnetic properties of epitaxial Fe monolayers (ML) grown on a single crystalline Mo(110) surface coated by a monolayer coverage of Au were studied by low temperature (5K) spin polarized scanning tunneling microscopy (SP-STM) and spectroscopy (SP-STS). We observed a magnetic contrast on the Fe nanowires through a Au monolayer. The Au coverage provokes a loss of magnetic contrast for Au coverages exceeding 0.1 ML, suggesting an instantaneous spin reorientation transition of the Fe ML from an out-of-plane easy axis for up to 0.1 ML Au to an in-plane easy axis for higher Au coverages. The magnetic contrast of the Au coated Fe ML is similar to the contrast observed for the uncovered Fe/Mo(110) ML. Annealing of an ultrathin Au/Fe/Mo(110) film completely destroys the Fe nanowire structure resulting in circular shaped islands of double layer (DL) height surrounded by a homogeneous monolayer coverage. The DL islands reveal a perpendicular magnetization, while the surrounding ML areas appear non-magnetic. Spectroscopic data suggests that the DL islands consist of an Fe layer at the Mo(110) substrate and a Au coating layer.