This project aims at the growth and lateral patterning of magnetic heterostructures. The magnetic heterostructures are being analyzed with respect to their atomic and spin structure by a variety of methods, including resonant magnetic x-ray and polarized neutron scattering, MOKE, SQUID, MFM, etc. The magnetic heterostructures are primerily grown by molecular beam epitaxy, ion beam sputtering, and rf-sputtering. The magnetization reversal processes are being studied in real space by Kerr microscopy and MFM, and in reciprocal space by Bragg-MOKE and polarized neutron reflectivity. Furthermore, we aim to investigate the time dependence of the magnetization reversal by time resolved resonant magnetic x-ray scattering. The goal is a deeper understanding of the magnetization reversal processes in laterally patterned and functionalized magnetic arrays in dependence of their geometry, aspect ratio, magnetic anisotropy, and interaction with neighboring layers.
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Leiter
PD Dr. Katharina Theis-Bröhl
Institut für Experimentalphysik/Oberflächenphysik
Ruhr-Universität Bochum
44780 Bochum
Tel:0234 32 28348
Fax:0234 32 14173
E-Mail: 
k.theis-broehl@rub.de
Prof. Dr. Dr. h.c. Hartmut Zabel
Institut für Experimentalphysik/Oberflächenphysik
Ruhr-Universität Bochum
44780 Bochum
Tel:0234 32 23649
Fax:0234 32 14173
E-Mail:
hartmut.zabel@rub.de
Forschergruppe
- F. Brüssing
- O. Petracic
- A. Schumann
- K. Theis-Bröhl
- H. Zabel
Publikationen
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Magnetization reversal of nanostructured magnetic spirals
A. Westphalen, A. Remhof, H. Zabel
J. Appl. Phys. 104 (2008) 013906
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Magnetostatic interactions on a square lattice
A. Westphalen, A. Schumann, A. Remhof, and H. Zabel, M. Karolak, B. Baxevanis, and E. Y. Vedmedenko, T. Last, U. Kunze, and T. Eimüller
Phys. Rev. B 77 (2008) 174407.
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Vector and Bragg MOKE for the analysis of nanostructured magnetic arrays
A. Westphalen, M.-S. Lee, A. Remhof, and H. Zabel
Review Scientific Instruments, 78 (2007) 121301 (invited review)
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Structural and magnetic properties of stoichiometric epitaxial CoO/Fe exchange bias bilayers
Gregor Nowak, Arndt Remhof, Florin Radu, Alexei Nefedov, Hans-Werner Becker, and Hartmut Zabel,
Phys. Rev. B 75 (2007) 174405
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Fundamental Aspects of Exchange Bias
F. Radu and H. Zabel
Springer Tracts in Modern Physics, Volume 227 (2007)
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Exchange-bias instability in a bilayer with an ion-beam imprinted stripe pattern of ferromagnetic/antiferromagnetic interfaces
K. Theis-Bröhl, M. Wolff, A. Westphalen, H. Zabel, J. McCord, V. Häoink, J. Schmalhorst, T. Weis, D. Engel, A. Ehresmann, U. Rücker, B. P. Toperverg,
Phys. Rev. B 73 (2006) 174408
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Magnetization reversal of equilateral Fe triangles
A. Westphalen, A. Schumann, A. Remhof, H. Zabel, T. Last, and U. Kunze
Phys. Rev. B 74 (2006) 104417
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Quantitative description of the azimuthal dependence of the exchange bias effect
F. Radu, A. Westphalen, K. Theis-Bröhl, and H. Zabel
J. Phys. Cond. Mat. 18 (2006) L29
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