ISIS Neutron and Muon Source Data Journal

Phase diagram of the novel triangular lattice antiferromagnet ErTa7O19

Abstract: Ising-like triangular lattice antiferromagnets represent a promising avenue in the search for enigmatic quantum states of matter. Our previous studies have demonstrated that erbium heptatantalate, ErTa7O19, is a realization of such a system with intriguing magnetic properties. Recent single-crystal neutron diffraction measurements performed on the WISH instrument (RB2320281, RB 2420338) have revealed a realization of the puzzling spin supersolid state below TN = 100 mK in zero field. However, the experiments also revealed that this state is, surprisingly, unstable against melting at low temperatures when the magnetic order on cooling transforms into a short-range ordered state with stripe-like correlations. We propose additional neutron diffraction experiments to determine the nature of this state as well as to investigate its stability against the applied magnetic field, which is known to stabilize a long-range up-up-down order reflecting in the 1/3 magnetization plateau in this system at higher temperatures.

Principal Investigator: Dr Andrej Zorko
Experimenter: Dr Fabio Orlandi
Experimenter: Professor Matja? Gomil?ek
Experimenter: Dr Matej Pregelj
Experimenter: Professor Mirela Dragomir
Experimenter: Dr Dmitry Khalyavin
Local Contact: Dr Pascal Manuel
Experimenter: Mr Kevin Jakseti?
Experimenter: Dr Panchanana Khuntia

DOI: 10.5286/ISIS.E.RB2610191

ISIS Experiment Number: RB2610191

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 Andrej Zorko et al; (2026): Phase diagram of the novel triangular lattice antiferromagnet ErTa7O19, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2610191

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