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.
Search for magnetic long-range order in a spin-liquid candidate K2Ti2(PO4)3
Abstract: Quantum spin liquids (QSLs), lacking long-range magnetic order (LRO) due to quantum fluctuations, are pursued in frustrated systems. Recent studies highlight 3D trillium lattices, e.g., K?Ni?(SO?)?, showing dynamic ground states despite weak order. We present K?Ti?(PO?)?, a langbeinite with Tił? (S=1/2) on a single trillium lattice?structurally akin to MnSi but localized. Contrary to theory, magnetization shows no LRO down to 0.3 K, with antiferromagnetic correlations (? ? -30 K). AC susceptibility reveals a 0.2 K maximum, while zero-field ?SR confirms a dynamic ground state at 30 mK, persisting under 2 T. These findings challenge single-trillium frustration models. We propose neutron diffraction on K?Ti?(PO?)? powders (100 mK, WISH) to detect magnetic Bragg peaks or diffuse scattering. Prior work on K?Ni?(SO?)? showed WISH?s sensitivity to subtle order (e.g., tripled magnetic cells) despite ?SR dynamics. Measurements at 100 mK (~4h) and temperature scans (20 mK steps) will resolve structural/magnetic symmetry. Detecting order would challenge QSL criteria; absence strengthens 3D QSL evidence. This study bridges theory-experiment gaps in quantum magnetism. We request 2 days on WISH (cooldown included) to decode this S=1/2 trillium system?s ground state.
Principal Investigator: Dr Ivica Zivkovic
Local Contact: Dr Pascal Manuel
Experimenter: Mrs Berna Esmer
Experimenter: Professor Henrik Ronnow
DOI: 10.5286/ISIS.E.RB2520600
ISIS Experiment Number: RB2520600
| Part DOI | Instrument | Public release date | Download Link |
|---|---|---|---|
| 10.5286/ISIS.E.RB2520600-1 | WISH | 14 October 2028 | 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 Ivica Zivkovic et al; (2025): Search for magnetic long-range order in a spin-liquid candidate K2Ti2(PO4)3, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2520600
Data is released under the CC-BY-4.0 license.
