Berlin 2018 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 37: Skyrmions II (joint session MA/TT/KFM)
TT 37.2: Talk
Tuesday, March 13, 2018, 09:45–10:00, EB 301
Probing skyrmion lattice phase by NMR in GaV4S8 — •Markus Prinz-Zwick, Norbert Büttgen, Vladimir Tsurkan, Martina Schädler, and István Kézsmárki — Center of electronic correlation and magnetism, University of Augsburg
With the discovery of Néel-Type skyrmions forming in a skyrmion lattice (SkL) in the lacunar spinel GaV4S8, the characterization and analysis of such polar axially symmetric skyrmion host materials gained general interest. From a microscopic point of view we want to elucidate the local distribution of internal magnetic fields associated with the SkL and probe spin excitations using Nuclear Magnetic Resonance(NMR) spectroscopy. Since the stability of the SkL phase is limited to the sub-Tesla range, this is a highly challenging issue. Here, we report NMR results within the SkL-phase in the lacunar spinel GaV4S8, and the first so called zero-field NMR measurements, where the internal field of the V4 cubanes was exploited to perform 51V measurements for applied magnetic fields 0<µ0H<100 mT.