Münster 1999 – wissenschaftliches Programm
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AM: Magnetismus
AM 10: Postersitzung
AM 10.25: Poster
Dienstag, 23. März 1999, 16:15–20:00, F\"urstenberghaus
Structural and magnetic properties of electrodeposited ultrathin Co films on Au(111) — •D. Spoddig1, J. L. Bubendorff2, J. Pflaum1, J. P. Bucher2, and J. Pelzl1 — 1Experimentalphysik III, Ruhr Universität, D-44780 Bochum, Germany — 2Institut de Physique et de Chimie des Materiaux de Strasbourg, Universite Louis Pasteur ,3 rue du Loess, Strasbourg, F67037, France
The advantage of computer controlled electrolytic processes has raised
the hope that ultrathin epitaxial
films with tailored magnetic properties can be prepared by
electrodeposition [1]. Here we report on
electrodeposition of Co-films on a Au(111)-surface where the growth
process was monitored by scaning
tunnel microscope (STM) and magneto optic Kerr-effect (MOKE). The
structural and magnetic properties
have subsequently been analysed ex-situ by complementary techniques.
Deposition of Co was performed on
high quality Au(111) films which were vacuum evaporated on mica and then
flame annealed. The films were
grown in a 3-electrode cell under potentiostatic control from a cobalt
sulfate and sulfamate bath. Ex-situ
measurements show a change form hcp to fcc structures as an effect of
thickness and overpotential during the
growth. Due to this effect the magnetization of the electrodeposited
ultrathin cobalt films can be tuned continuously
from in-plane to out-of-plane. The change in the magnetic anisotropies
due to the influence of a magnetic field during
the deposition were shown.
DAAD. The Centre National de la Recherche
Forschungsgemeinschaft (DFG) is acknowledged for thier
[1] J.L. Bubendorff et. al., Sur. Scie. Lett. 384 (1997) L836