ISIS Neutron and Muon Source Data Journal

Magnetic Structure of the Weyl Semi-Metal Mn_3Ge

Abstract: In recent years attention has been drawn to exploiting the physics of new materials which exhibit dissipation-less quantum states. Exemplars or such materials are the non-collinear antiferromagnetic Weyl semi-metals such as Mn_3Ge. The presence of Weyl points and spin-orbit coupling induced gaps in Mn_3Ge, and cousin systems has been found to lead to a large anomalous Hall effect, despite absence of a sizeable ferromagnetic order. We propose a polarized neutron reflectivity study of thin film samples of Mn_3Ge. In our studies to date we see evidence that the surfaces of our films have a remnant ferromagnetism although the bulk is antiferromagnetic and that there is a strong temperature dependence to the magnetisation. We wish to measure and understand the magnetisation profile in our thin films at temperatures below room temperature with the eventual aim of exploiting the topological states at interfaces with other material systems.

Principal Investigator: Professor Gavin Burnell
Experimenter: Dr Servet Ozdemir
Experimenter: Dr Ping-Luen Ho
Experimenter: Professor Sandrine Heutz
Experimenter: Professor Bryan Hickey
Local Contact: Dr Christy Kinane

DOI: 10.5286/ISIS.E.RB2520581

ISIS Experiment Number: RB2520581

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:
Professor Gavin Burnell et al; (2026): Magnetic Structure of the Weyl Semi-Metal Mn_3Ge, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2520581

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