Berlin 2015 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 70: Correlated Electrons: Spin Systems and Itinerant Magnets – Chiral Magnets (jointly with MA)
TT 70.2: Vortrag
Mittwoch, 18. März 2015, 18:15–18:30, H 3005
Neutron spin-echo spectroscopy of spin fluctuations in the skyrmion lattice phase of MnSi — •Franz Haslbeck1, Jonas Kindervater1, Andreas Bauer1, Wolfgang Häußler1,2, Peter Böni1, and Christian Pfleiderer1 — 1Physik-Department, Technische Universität München, Germany — 2Heinz Maier-Leibnitz Zentrum, Technische Universität München, Germany
Recent theoretical studies suggest that the skyrmion lattice phase in chiral magnets such as MnSi is stabilised by thermal spin fluctuations [1,2]. We report an experimental study of the quasielastic spectrum of spin fluctuations in the skyrmion lattice phase of MnSi. Using the so called MIEZE spin-echo technique at the spectrometer RESEDA at FRM II we achieved an unprecedented resolution below 1 µeV going well beyond a first preliminary study [3]. Applying a magnetic field parallel and perpendicular to the neutron beam allowed us to study the fluctuations in and out of plane of the skyrmion lattice.
[1] S. Mühlbauer et al., Science 323, 915 (2009).
[2] S. Buhrandt, L. Fritz, Phys. Rev. B 88, 195137 (2013).
[3] R. Georgii et al., Appl. Phys. Lett. 98, 073505 (2011).