This summer, MAGicSky participants are disseminating their very promising results on skyrmions.
The SOCSIS (Spin Orbit Coupling and Topology in Low Dimensions) workshop in Spetses, Greece, as well as the Sol-Skymag conference in San Sebastian, Spain, are a very good start for this skyrmionic summer.
More information on the presentations made during these events can be found on our twitter account.
(V. Cros presenting results in Spetses) (View from the Sol-Skymag venue in San Sebastian)
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Within the EU project MagicSky the spintronics theory group at the Institute of Theoretical Physics and Astrophysics at the Christian-Albrechts-Universität of Kiel is opening two PhD positions in the field of magnetic skyrmions at interfaces and surfaces.
One of the PhD candidates will focus on the exploration of complex magnetic structures at surfaces and interfaces based on first-principles electronic structure theory. She/he is expected to perform first-principles calculations using density functional theory as implemented in the FLEUR code to explore magnetic interactions at transition-metal interfaces.
The second PhD candidate will develop and apply parallel tempering Monte-Carlo and spin dynamics simulations to study the phase diagram, stability and interaction of magnetic skyrmions at interfaces and in multilayers. The parameters are obtained from the DFT calculations by mapping total energy calculations to an effective spin Hamiltonian.
For more information, please have a look at the job offer.
Contact for the positions:
Prof. Dr. Stefan Heinze
Institute of Theoretical Physics and Astrophysics
Christian-Albrechts-Universität zu Kiel
24098 Kiel, Germany
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The seven partners forming the MAGicSky-FET consortium gathered together on the 18th and on the 19th of February in Hamburg, Germany.
Very promising results and fruitful collaborations have led the meetings all along this two-day event.
The consortium was able to visit the Institut für Nanostruktur- und Festkörperphysik (INF) at the Universität Hamburg. MAGicSky young PhD students and Postdocs took this oppurtunity to interact and discuss about each other's various experiments.
The consortium gave its full attention to promising results and to challenges yet to tackle.
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In this article, we demonstrate that we stabilize isolated magnetic skyrmions of a few tens of nanometers of diameter at room temperature and very low magnetic field. To achieve this purpose, we designed cobalt-based multilayered thin films in which the cobalt layer is sandwiched between two heavy metals in order to achieve additive interfacial Dzyaloshinskii–Moriya interactions (DMIs), and a large value close to 2 mJ m–2 in the case of the Ir|Co|Pt asymmetric multilayers.
This strategy allows us to stabilize isolated skyrmions at very low magnetic field in extended films, as well as in nanostructures such as disks or tracks in the submicrometer range. To image the skyrmions we employed advanced nanoscale magnetic X-ray imaging in large Synchrotron facilities to systematically investigate the evolution of magnetic domains and magnetic skyrmions size with magnetic fields. These results represent an experimental breakthrough that can be a robust basis for the development of skyrmion- based devices for memory and/or logic applications, as well as the starting point of further fundamental studies at room temperature on the very rich physics of skyrmions.
This is a collaboration between two partners from MAGicSky : CNRS (main investigators : Nicolas Reyren, Vincent Cros and Albert Fert) and PSI (main investigator : Christoforos Moutafis, now at University of Manchester, UK)
“Additive interfacial chiral interaction in multilayers for stabilization of small individual skyrmions at room temperature”. Nature Nanotechnol. doi:10.1038/nnano.2015.313
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