Berlin 2015 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 71: Correlated Electrons: Poster Session

TT 71.34: Poster

Mittwoch, 18. März 2015, 15:00–18:00, Poster B

NMR of the Shastry-Sutherland lattice SrCu2(BO3)2 in pulsed magnetic fieldsR. Stern1, J. Kohlrautz2, J. Haase2, •H. Kuehne3, E.L. Green3, and J. Wosnitza31National Institute of Chemical Physics and Biophysics, 12618 Tallinn, Estonia — 2Universität Leipzig, Faculty of Physics and Earth Sciences, 04103 Leipzig, Germany — 3Hochfeld-Magnetlabor Dresden (HLD), Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany

SrCu2(BO3)2 is a quasi-two-dimensional spin system consisting of Cu2+ ions which form orthogonal spin-singlet dimers, also known as the Shastry-Sutherland lattice. This system has been studied extensively using a variety of techniques to probe the spin-triplet excitations, including recent magnetization measurements over 100 T. Spectroscopic techniques, such as nuclear magnetic resonance (NMR), can provide further insight into the spin-coupling mechanisms and excitations. We present 11B NMR spectra measured in pulsed magnetic fields up to 54 T, and compare those with prior results obtained in static magnetic fields at 41 T. Herewith, we prove the feasibility and efficacy of this technique, yielding the capability for extended studies at highest magnetic fields up to the 100 T regime that determine the spin structure in the 1/3 magnetization plateau and beyond.

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DPG-Physik > DPG-Verhandlungen > 2015 > Berlin