Dresden 2009 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 3: Correlated Electrons: Spin Systems and Itinerant Magnets 1
TT 3.8: Talk
Monday, March 23, 2009, 12:15–12:30, HSZ 304
Skyrmion Lattice in Fe1−xCoxSi — •Wolfgang Münzer1, Christian Franz1, Andreas Neubauer1, Sebastian Mühlbauer1, Tim Adams1, Florian Jonietz1, Christian Pfleiderer1, Benedikt Binz2, Achim Rosch2, Robert Georgii3, Peter Böni1, Martin Schmid4, and Juri Grin4 — 1Physik Department E21, Technische Universität München, D-85748 Garching, Germany — 2Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM II), Technische Universität München, D-85748 Garching, Germany — 3ITP, University of Cologne, Zülpicher Str. 77, D-50937 Cologne, Germany — 4Max Planck Institut für Chemische Physik fester Stoffe, 01187, Dresden, Germany
The recent identification of the A-phase in MnSi as a hexagonal lattice of anti-skyrmions raises the question, if skyrmion lattice ground states exist in further members of the series of B20 transition metal compounds. We have grown single crystals of selected compositions in the series Fe1−xCoxSi by means of vapor transport and optical float zoning. Our samples are consistent with the previously reported temperature versus composition phase diagram. Comprehensive neutron scattering and magneto-transport measurements establish an extremely rich magnetic phase diagram of skyrmion phases as a function of magnetic field strength, temperature and direction.