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.
Crystal field excitations in a novel Jeff=1/2 square lattice antiferromagnet
Abstract: Spin-liquid (SL) refers to a highly entangled quantum state wherein strong frustration-induced quantum fluctuations prevent a symmetry breaking phase transitions at T 0 in magnetic materials despite strong exchange interactions between spins. SLs are ideal hosts of exotic fractional quantum numbers coupled to emergent gauge fields and hold tantalizing prospects for application in fault-tolerant quantum computing. The experimental realization of SLs in two-dimensional spin lattice remains elusive in view of the presence of defects and anti-site disorder in real materials. Rare-earth based frustrated magnets provide a novel route for exploring the enigmatic SL state with fractional magnetic excitations. The recently synthesized a structurally perfect square lattice antiferromagnet Na2Nd2Ti3O10 seems a very promising SL candidate, as confirmed by a series of macroscopic measurements. The localized Nd3+ spins show neither magnetic order nor spin-freezing state down to 0.1 K. Thermodynamic data reveal an effective Jeff = 1/2 (Nd3+) in the Kramers doublet state and a weak antiferromagnetic interaction ( Jex ~0.7 K) between Jeff = 1/2 moments typical in 4f magnets. The specific heat reveals a broad peak at 0.7 K, reflecting the presence of short-range spin correlations. In this context, INS offers a sensitive local probe to track low-energy excitations possibly include those emerge from the crystal electric field, which are essential to understand the magnetism and anisotropy.
Principal Investigator: Dr Panchanana Khuntia
Local Contact: Dr Devashi Adroja
DOI: 10.5286/ISIS.E.RB2610405
ISIS Experiment Number: RB2610405
| Part DOI | Instrument | Public release date | Download Link |
|---|---|---|---|
| 10.5286/ISIS.E.RB2610405-1 | MERLIN | 11 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 Panchanana Khuntia et al; (2026): Crystal field excitations in a novel Jeff=1/2 square lattice antiferromagnet, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2610405
Data is released under the CC-BY-4.0 license.
