ISIS Neutron and Muon Source Data Journal
This is a page describing data taken during an experiment at the ISIS Neutron and Muon Source. Information about the ISIS Neutron and Muon Source can be found at https://www.isis.stfc.ac.uk.
Investigating the crystal-electric-field structure of triangular lattice HoTa7O19
Abstract: Quantum spin liquids (QSLs) are exotic magnetic ground states characterized by long-range quantum entanglement and the absence of magnetic ordering down to zero temperature. Rare-earth (RE)-based frustrated lattices are prominent candidates for realizing QSL behaviour, owing to strong spin orbit coupling (SOC) and the localized nature of 4f electrons. Recently, NdTa7O19 has been reported to host a magnetically disordered ground state with Ising-like correlations giving rise to spin excitations persisting down to 40 mK. This finding highlights the potential of the family RETa7O19 to realize QSL or other exotic quantum states. We have successfully synthesized polycrystalline HoTa7O19, and performed magnetic susceptibility, specific heat, and muon spin relaxation measurements. No magnetic ordering is detected down to 30 mK, indicating a magnetic disordered ground state. We observed two characteristic temperatures (8 K and 40 K) from both muon spin relaxation and specific heat measurements. To clarify the physical origin of the two characteristic temperatures, and further understand the underlying magnetic ground states of HoTa7O19, we propose detailed measurements of CEF levels. These experiments are essential to distinguish between low-energy spin dynamics of magnetic origin and relaxation processes driven by CEF excitations.
Principal Investigator: Dr Chengyu Jiang
Experimenter: Ms Felicia Hage
Experimenter: Ms Miriam Piccinini
Experimenter: Professor Martin Mansson
Local Contact: Dr Devashi Adroja
Experimenter: Professor Yasmine Sassa
DOI: 10.5286/ISIS.E.RB2610157
ISIS Experiment Number: RB2610157
| Part DOI | Instrument | Public release date | Download Link |
|---|---|---|---|
| 10.5286/ISIS.E.RB2610157-1 | MERLIN | 05 June 2029 | Download |
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 Chengyu Jiang et al; (2026): Investigating the crystal-electric-field structure of triangular lattice HoTa7O19, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2610157
Data is released under the CC-BY-4.0 license.
