ISIS Neutron and Muon Source Data Journal

Probing magnetic structure of antiferromagnetic topological semimetal EuCuAs by Neutron Diffraction

Abstract: Magnetic topological insulators provide an important platform for realizing several exotic quantum phenomena, such as anomalous Hall effect, anomalous Nernst effect, and topological Hall effect (THE), owing to the interplay between topology and magnetism. Antiferromagnetic (AFM) materials exhibit THE due to the presence of nontrivial spin structures. EuCuAs crystallizes in a hexagonal structure with an AFM ground state (Néel temperature ~15 K). We observed a large TH resistivity of ~ 7.4 ??-cm at 13 K. From magnetic studies, it is predicted that the large TH effect can be attributed to the noncollinear spin structure that occurs during the metamagnetic transition. Therefore, a knowledge of the ground state and in-field magnetic structures of EuCuAs by neutron diffraction is imperative to understand the origin of large TH resistivity. In addition, by controlling the magnetic ordering structure of EuCuAs with an external magnetic field, several fascinating topological states, such as Dirac and Weyl semimetals, have been revealed. These promising results suggest the possibility of spintronic devices based on antiferromagnets with tailored noncoplanar spin configurations.

Local Contact: Dr Fabio Orlandi
Experimenter: Dr Sushmita Chandra
Experimenter: Dr Premakumar Yanda

DOI: 10.5286/ISIS.E.RB2200378

ISIS Experiment Number: RB2200378

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:
Dr Fabio Orlandi et al; (2023): Probing magnetic structure of antiferromagnetic topological semimetal EuCuAs by Neutron Diffraction, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2200378

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