ISIS Neutron and Muon Source Data Journal

Magnetic excitation in buckled honeycomb compound gamma-Co2P2O7 with Kitaev magnetism

Abstract: We propose to perform inelastic neutron scattering on buckled honeycomb compound gamma-Co2P2O7. Honeycomb cobaltates have been studied as a candidate of Kitaev spin liquid, but some of them have been shown to have predominant Heisenberg coupling, rather than Kitaev coupling, due to direct t2g hopping. To realize a Kitaev-dominant magnet, we focused on gamma-Co2P2O7 which has much larger Co-Co bond length than those of other honeycomb cobaltates, likely suppressing undesired Heisenberg coupling. gamma-Co2P2O7 shows two magnetic transitions at low temperatures. By increasing magnetic fields, the transitions are gradually suppressed and a spin-liquid-like behavior is seen above 7 T. However, we don't have detailed information about underlying magnetic interactions. We therefore plan to study the magnon dispersion by INS and extract relevant magnetic interactions.

Principal Investigator: Dr Tomohiro Takayama
Local Contact: Dr Travis Williams
Experimenter: Dr Aleksandra Krajewska

DOI: 10.5286/ISIS.E.RB2420253

ISIS Experiment Number: RB2420253

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 Tomohiro Takayama et al; (2025): Magnetic excitation in buckled honeycomb compound gamma-Co2P2O7 with Kitaev magnetism, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2420253

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