Berlin 2008 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 18: Poster I : Bio Magn. (1-2); Mag.Imgaging (3-9); Magn. Semiconductors (10-16); Half Metals & Oxides (17-20); Coupl.Phenomena (21-27); Magn. Mat. (28-41); Micro & Nanostr. Magn. Materials (42-61); Micro Magn. (62-64); Surface Magnetism (65-70); Transport Phenomena (71-85)

MA 18.42: Poster

Dienstag, 26. Februar 2008, 15:15–18:30, Poster E

X-ray and Neutron Scattering on a Ni dot array — •Wolfgang Kreuzpaintner, Dieter Lott, Michael Störmer, and Andreas Schreyer — GKSS Forschungszentrum GmbH, Max-Planck-Str. 1, 21502 Geesthacht

Since some time elastic and inelastic neutron scattering on magnetic bulk and thin layer materials has proven as a reliable analysis method and has even allowed for collecting spin wave information from rare earth super lattice samples with multilayer periods below the μm-scale.

However, for on the sub-μm scale laterally structured magnetic samples, these inelastic experimental possibilities are still not that far developed and, consequently, not that well established. Nevertheless, theoretical calculations show, such experiments should be possible and could yield essential information for the further development of higher density magnetic data storage devices and new technologies like magnetic random access memory as not only magnetic switching behavior but also the spin wave dispersion could be probed in regions of the Brillouin zone which by other means are not accessible.

The middle to long term goal of measuring quantized spin waves on magnetic nanostructures by inelastic neutron scattering is an ambitious task and requires the optimization of a variety of parameters of both, instrumental and specimen sides.

We here present recently performed x-ray and neutron test measurements on Ni dots with 200nm diameter arranged in a 2D square lattice array with 700nm periodicity.