Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 41: Magnetic Textures: Statics and Imaging II

MA 41.6: Vortrag

Donnerstag, 4. April 2019, 10:45–11:00, H37

New findings in the magnetic phase diagram of GaV₄Se₈ — •Bertalan György Szigeti¹, Sándor Bordács², Ádám Butykai², Korbinian Geirhos¹, Jonathan Stuart White³, Peter Lunkenheimer¹, Vladimir Tsurkan¹, Martino Poggio⁴, and István Kézsmárki¹ — ¹Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135, Ausgburg, Germany — ²Department of Physics, Budapest University of Technology and Economics, 1111, Budapest, Hungary — ³Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, CH-5232, Villigen, Switzerland — ⁴Department of Physics, University of Basel, 4056, Basel, Switzerland

GaV₄Se₈ is a member of the lacunar spinel family, which was found to host a robust Néel-type skyrmion lattice (SkL) on the full temperature range below the paramagnetic state down to zero kelvin and on a wide field range, even in oblique field directions[1]. This wide stability range is due to the polar, easy-plane anisotropic nature of GaV₄Se₈. In oblique magnetic fields we observed an additional modulated phase besides the cycloidal and the SkL states, using small-angle neutron scattering, magnetic torque, magnetization and magnetocurrent measurements. The formation of this novel modulated phase shows strong connection with the reorientation process of the modulation vectors.

[1] Bordács, S., et al., Sci. Rep. 7.1, 7584 (2017)