Berlin 2015 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
TT: Fachverband Tiefe Temperaturen
TT 14: Surface Magnetism – Skyrmions (jointly with MA, O)
TT 14.11: Talk
Monday, March 16, 2015, 12:15–12:30, EB 301
A Magnetic Nano-Skyrmion Lattice observed in a Si-wafer based Multilayer System — •Stefan Krause1, Anika Schlenhoff1, Philipp Lindner1, Johannes Friedlein1, Roland Wiesendanger1, Michael Weinl2, Matthias Schreck2, and Manfred Albrecht2 — 1Department of Physics, University of Hamburg, Germany — 2Institute of Physics, University of Augsburg, Germany
Recently, an atomic-scale two-dimensional magnetic skyrmion lattice at the Fe/Ir(111) interface has been discovered using spin-polarized scanning tunneling microscopy (SP-STM).[1] Skyrmions offer new exciting possibilities for spintronic applications, using them as digital information carriers. For these applications the mass production of devices using multilayer growth on large-scale substrates is indispensable.
In 2009, the heteroepitaxial growth of single crystal Ir(111) films on Si(111) wafers with yttria-stabilized zirconia buffer layers has been demonstrated.[2] For our study we epitaxially grow one monolayer of Fe on top of this multilayer substrate. The SP-STM experiments reveal a magnetic skyrmion lattice, being fully equivalent to the magnetic ground state that has previously been observed on an Ir(111) bulk single crystal substrate. In addition, it is found to be robust against local atomic lattice distortions induced by multilayer preparation. Our work paves the way towards spintronic applications of nano-skyrmions in ultrathin films and multilayer systems.
[1] S. Heinze et al., Nature Physics 7, 713 (2011).
[2] S. Gsell et al., J. Cryst. Growth 311, 3731 (2009).