Regensburg 2019 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 50: Poster Session: Correlated Electrons 2
TT 50.17: Poster
Mittwoch, 3. April 2019, 15:00–18:30, Poster D
Multipolar ordered magnetic ground state of the triangular Ising antiferromagnet TmMgGaO4 — •A. Hauspurg1,2, L. Opherden1, S. Chattopadhyay1, M. Uhlarz1, T. Herrmannsdörfer1, and J. Wosnitza1,2 — 1Hochfeld-Magnetlabor Dresden (HLD-EMFL), HZDR, Dresden, Germany — 2Institut für Festkörper- und Materialphysik, TU Dresden, Germany
TmMgGaO4 is a quasi-two-dimensional triangular spin system with Ising anisotropy. As a sister compound of YbMgGaO4, which recently was identified as a spin liquid material, it turned out to show a different magnetic ground state at low temperatures. In terms of an almost absent zero-point entropy and distinct anomalies in ac susceptibility a variety of exotic magnetically ordered multipolar phases is observed at very low temperatures. In our work, we present latest results of ac-susceptibility and vector-magnetometry experiments performed on single-crystalline TmMgGaO4 at lowest temperatures and up to high magnetic fields.