Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 7: Magnetic Textures: Statics and Imaging I

MA 7.10: Vortrag

Montag, 1. April 2019, 17:45–18:00, H37

Multi-k spin textures in the complex magnetic phase diagram of rare-earth copper compounds — •Wolfgang Simeth1, Marein Rahn2, Andreas Bauer1, Robert Georgii3, Matthias Gutmann7, Vladimir Hutanu3, Pascal Manuel7, Martin Meven3, Sebastian Mühlbauer3, Kirill Nemkovski4, Bachir Ouladdiaf6, Karel Prokes5, Tobias Schrader3,4, and Christian Pfleiderer11Technische Universität München — 2Los Alamos National Laboratory — 3Forschungs-Neutronenquelle Heinz Maier-Leibnitz (FRM II) — 4Forschungszentrum Jülich — 5Helmholtz-Zentrum Berlin — 6Institut Laue-Langevin — 7ISIS neutron and muon source

The rare-earth intermetallics RCu (R = Ho, Tm, Er) condense in the centrosymmetric CsCl-structure. As a consequence of several competing interactions (itinerant, indirect exchange, quadrupolar interactions as well as crystal electric fields), a rich magnetic phase diagram with a multitude of phase pockets unfolds. In these phases, the localized 4f magnetic moments exhibit complex arrangements as magnetic ground states. For a proper determination of these structures, several neutron techniques were combined. Both as a function of temperature and field the compounds undergo phase transitions between several antiferromagnetic multi-k states. The textures we identified are highly non-collinear and exhibit modulations with a large wavelength in the range of nanometres.

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