ISIS Neutron and Muon Source Data Journal

Magnetic structure of a novel Co-based honeycomb antiferromagnet

Abstract: Bond-dependent anisotropy leads to stabilization of unconventional magnetic structures. We propose here to investigate the magnetic structure in a novel honeycomb antiferromagnet, namely K4CoMo4O15, using magnetic diffraction on the WISH diffractometer. In the target material, Co2+ octahedra are bridged by MoO4 units to form honeycomb planes, which are well separated from each other through K+ layers, with no observable chemical disorder (probed on single crystals). The long Co-MoO4-Co bridges lead to reduced nearest-neighbour exchange energies, and a strong suppression of any further neighbour coupling. As a result, this material is a fantastic candidate to explore Kitaev-like physics and bond-dependent anisotropic exchanges. We have phase-pure powder samples that show indications of magnetic ordering below 1 K, with a Curie-Weiss temperature of -2 K. The high resolution at large d-spacings available at WISH makes this instrument ideally suited for our study.

Principal Investigator: Mr Daniel Flavián Blasco
Local Contact: Dr Pascal Manuel
Experimenter: Mr Ben Radick
Experimenter: Professor Radu Coldea

DOI: 10.5286/ISIS.E.RB2620080

ISIS Experiment Number: RB2620080

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 Daniel Flavián Blasco et al; (2026): Magnetic structure of a novel Co-based honeycomb antiferromagnet, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2620080

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