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MA: Fachverband Magnetismus

MA 59: Posters Magnetism III

MA 59.34: Poster

Freitag, 20. März 2020, 09:00–12:00, P2/EG

GdBiTe: A candidate magnetic topological semimetal — •Paul Gebauer¹, Laura T. Corredor Bohorquez², Anja U. B. Wolter², Bernd Büchner^{2, 3}, Thomas Doert¹, and Anna Isaeva^{2, 3} — ¹Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Dresden, Germany — ²Institute for Solid State and Materials Research, Leibniz IFW Dresden, Dresden, Germany — ³Faculty of Physics, Technische Universität Dresden, Dresden, Germany

Interacting topological materieals with a non-trivial topology of the electronic band structure and intrinsic magnetic ordering hold promises for spintronic applications. GdSbTe was reported as an antiferromagnetic nodal-line semimetal [1]. We discover GdBiTe with even stronger spin-orbit coupling. The powder is synthesized by a solid-state reaction of the elements. The crystal structure (space group P4/nmm; a = 436.9(1) pm, b = 924.3(1) pm) is determined by single-crystal X-Ray diffraction. The ground state from the first principles calculations is antiferromagnetic with a calculated magnetic moment 7.32 µ_B (expected 7.94 µ_B for Gd(III), J=7/2). Field- and temperature-dependent magnetization and specific heat measurements on polycrystalline samples show an antiferromagnetic state and a metamagnetic transition at 15 K, which nature remains to be eludicated. [1] M. M. Hosen, et al., Sci. Rep. 8, 13283 (2018).