Berlin 2018 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 9: Skyrmions II (joint session MA/TT/KFM)

KFM 9.2: Vortrag

Dienstag, 13. März 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.