Berlin 2018 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 41: Frustrated Magnets - Spin Liquids - Experiments

TT 41.3: Vortrag

Dienstag, 13. März 2018, 10:45–11:00, H 3005

Spin-1 triangular antiferromagnet BaMoP₂O₈ — •Jan Hembacher¹, Alexander Tsirlin¹, Danis Badrtdinov², and Clemens Ritter³ — ¹Experimental Physics VI, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany — ²Ural Federal University, Yekaterinburg, Russia — ³Institute Laue Langevin, B. P. 156, 38042, Grenoble, France

We present magnetic properties of a spin-1 antiferromagnet BaMoP₂O₈. It crystallizes in the C2/m space group, resulting in a layered crystal structure with the triangular arrangement of the magnetic Mo⁺⁴-ions. Frustrated interaction geometry leads to a broad maximum in the magnetic susceptibility around 50 K followed by the long-range ordering at 21 K. Neutron diffraction reveals the collinear stripe order with the reduced ordered moment of 1.48 µ_B compared to 2 µ_B expected for a spin-1 ion. The effects of spatial anisotropy, spin-orbit coupling, and metal-ligand covalency will be discussed.