Dresden 2009 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 40: Poster II: Bio- and Molecular Magnetism (1-9); Magnetic Coupling Phenomena/Exchange Bias (10-15); Magnetic Particlicles and Clusters (16-29); Micro and Nanostructured Magnetic Materials (30-51); Multiferroics (52-64); Spin Injection in Heterostructures (65-67); Spin-Dyn./Spin-Torque (68-93); Spindependent Transport (94-108)

MA 40.43: Poster

Freitag, 27. März 2009, 11:00–14:00, P1A

Combining glancing angle deposition and atomic layer deposition towards complex magnetic nanostructures — •Ole Albrecht¹, Robert Zierold¹, Christian Patzig², Detlef Görlitz¹, Bernd Rauschenbach², and Kornelius Nielsch¹ — ¹Institut für Angewandte Physik, Universität Hamburg, Jungiusstrasse 11, 20355 Hamburg — ²Leibniz-Institut für Oberflächenmodifikationen e.V. (IOM), Permoserstrasse 5, 04318 Leipzig

We present a new method for the fabrication of periodically ordered magnetic nanostructures by a combination of two established deposition techniques, namely Glancing Angle (GLAD) and Atomic Layer Deposition (ALD). Tilted Si columns with different tilt angles and zigzag structures were produced on Si surfaces by GLAD technique [1]. ALD, as a self-limiting deposition, has the ability to cover the Si structures conformally and without shadowing effects [2]. By subsequent reduction, a magnetic layer (Fe₃O₄) was obtained on the structures. The magnetic properties were investigated using a superconducting quantum interference device (SQUID) magnetometer at room temperature. The magnetic parameters remanence and coercivity are strongly affected by the orientation of the sample with respect to the applied field. Additionally, the three rotation axes are distinct, namely the curves H(θ,φ,ψ) and M_rem(θ,φ,ψ) reflect the geometry of each sample.

[1] M. Hawkeye et. al., J. Vac. Sci. Technol. A, 129, 9554 (2007) [2] J. Bachmann et. al., J. Am. Chem. Soc., 129, 9554 (2007)