Regensburg 2004 – scientific programme

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O: Oberflächenphysik

O 3: Nanostrukturen I

O 3.1: Talk

Monday, March 8, 2004, 11:15–11:30, H36

Co nanostructures on Ag/v-Cu(111) — •Frank Ostendorf, Andreas Bachmann, Georgi Rangelov, and Markus Donath — Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str. 10, 48149 Münster

Magnetic nanostructures play an important role in magnetic storage technology. An important aim in this context is the customization of the design parameters. The first step in preparing such nanostructures is the controlled production of a suitable template. A new possibility to produce regularly spaced nanostripes with controllable periodicity is the deposition of Ag on vicinal Cu(111) surfaces [1]. Depending on the Ag coverage, a rippled structure is formed in which Ag and Cu nanostripes alternate with a periodicity between 10 and 30 nm. On the atomic scale, the driving force for Ag-induced faceting is the lattice-matching between the Ag overlayer and the faceted Cu substrate. The unique property of this system is that the periodicity L of the nanostripes can be controlled via the Ag coverage. Magnetic nanostructures can be produced by selective deposition of magnetic material on the Ag or Cu facets of this template. We report results of Co nanostripes with a thickness of a few atomic layers, investigated by STM. The tunability of the spacing between the stripes may lead to a detailed understanding of the magnetic coupling between the nanostripes.

[1] A.R. Bachmann, F.Ostendorf and S. Speller, J. Phys.: Condens. Matter, 15 (2003), 1-25