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MA: Fachverband Magnetismus
MA 46: Poster II
MA 46.38: Poster
Thursday, March 21, 2024, 15:00–18:00, Poster C
Indications of dynamical magnetism in magnetically ordered Kagome metals
— •Sheetal Devi1, Yishui Zhou1, Min-Kai Lee2, Lieh-Jeng Chang2, Hubertus Luetkens3, Zurab Guguchia3, and Yixi Su1 — 1Jülich Centre for Neutron Science JCNS at Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, Lichtenbergstraße 1, D-85747 Garching, Germany
— 2Department of Physics, National Cheng Kung University, Taiwan 70101, Taiwan
— 3Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232, Villigen PSI, Switzerland
We have investigated the low-temperature physical properties of topological intermetallic compounds RV6Sn6 (R = Tb, Dy, Ho, Er) using heat-capacity and muon spin relaxation (µSR) measurements. These compounds feature a combination of a V-based nonmagnetic Kagome sublattice and an R-based magnetic triangular sublattice that harbors different spin anisotropies for different R ions. Long-range magnetic order is seen for R = Tb, Dy, Ho, and Er compounds at 4.3, 3.0, 2.4, and 0.6 K, respectively. However, the hyperfine analysis of the heat capacity data yields a reduced value of magnetic moment for all the compounds, implying persistence spin fluctuations down to 50 mK. Indications of such dynamical magnetism are further supported by our µSR studies. We argue that this intriguing competition and coexistence between persistent spin dynamics and long-range magnetic order is a manifestation of strong magnetic frustration in these systems.
Keywords: Kagome metal; frustrated magnetism; dynamical magnetism