ISIS Neutron and Muon Source Data Journal

Hypothesis of multi-q spin textures in a phase pocket of Eu2AuGe3

Abstract: Eu2AuGe3 is a little-known orthorhombic rare-earth intermetallic that we originally selected in a search for new topological semimetals. It exhibits an intriguing ordering sequence upon cooling, commencing with a gradual flat phonon-freezing at 130 K, followed by an (as-yet) unknown non-magnetic transition at 23 K, and helical magnetic and orbital order below 11 K. Here, we propose a single-crystal magnetic neutron scattering experiment to elucidate an unexpected metamagnetic phase pocket: When a field is applied perpendicular to the spins, the gradual spin-polarization via a conical state is interrupted by a shallow plateau (3.4~4.4 T). Phenomenologically, this evokes the characteristics of the famous "A Phase" skyrmion pocket of MnSi - although any analogy would raise profound questions on the mechanisms of correlations in this highly unusual material. The experimental plan is straightforward, and a recent test measurement guarantees feasibility.

Principal Investigator: Mr Vinícius Estevo Silva Frehse
Local Contact: Dr Pascal Manuel
Experimenter: Professor Marein Rahn
Experimenter: Dr Aleksandr Sukhanov
Experimenter: Dr Priscila Rosa

DOI: 10.5286/ISIS.E.RB2610541

ISIS Experiment Number: RB2610541

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Mr Vinícius Estevo Silva Frehse et al; (2026): Hypothesis of multi-q spin textures in a phase pocket of Eu2AuGe3, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2610541

Data is released under the CC-BY-4.0 license.