Berlin 2008 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 14: Surface or Interface Magnetism

O 14.6: Vortrag

Montag, 25. Februar 2008, 16:30–16:45, MA 043

Optical and magnetic properties of Ni films grown on Cu(110)-(2x1)O and Cu(110)-(2x3)N — •Richard Denk, Michael Hohage, Lidong Sun, and Peter Zeppenfeld — Atomic Physics and Surface Science Division, Institute for Experimental Physics, Johannes Kepler Universiät Linz, Austria

In the last years many studies concerning the growth and magnetic properties of thin ferromagnetic layers on nonmagnetic metallic substrates have been reported. While Ni on Cu(001) is one of the most prominent and best studied model systems, significantly less attention has been given to the Cu(110) surface, due to the less favourable growth mode of Ni on the bare Cu(110) surface. We have utilised Reflectance Difference Spectroscopy (RDS), to investigate the growth and the magnetic properties of thin Ni-films on two Cu(110) templates, namely Cu(110)-(2x1)O and Cu(110)-(2x3)N. The regular RDS signal allows for real time monitoring of the film growth and for film characterization. In addition, the sensitivity of the RD-spectrometer to the polar Magneto-Optical Kerr Effect (RD-MOKE) [1] has been used, in combination with an in situ magnet, to study the magnetic properties of the Ni films. Further characterization of the films was performed with STM and LEED/AES. Finally we report on adsorbate-induced (CO) quenching and spin reorientation of the magnetism of the Ni films. References: [1] Th. Herrmann, K. Lüdge, W. Richter, K.G. Georgarakis, P. Pouloloulos, R. Nünthel, J. Lindner, M. Wahl and N. Esser, Phys. Rev. B 73, 134408 (2006)