ISIS Neutron and Muon Source Data Journal

Investigating Spin-Wave Excitations in CsCuCl? and CsCoCl? via Inelastic Neutron Scattering

Abstract: CsCuCl? and CsCoCl? are triangular lattice antiferromagnets (TLAs) with complex magnetic phases due to geometrical frustration. CsCuCl? features quantum phase transitions and chiral helimagnetic structures, while CsCoCl? shows domain-wall solitons and spin-wave excitations with two distinct magnetic transitions at 20 K and 8 K. However, the magnetic ground states of these systems remain unclear. This proposal aims to investigate the spin dynamics and magnetic excitations in CsCuCl? and CsCoCl? via inelastic neutron scattering (INS) using the MARI spectrometer. We will focus on low-energy excitations to understand quantum fluctuations, the role of the Dzyaloshinskii-Moriya (DM) interaction in stabilizing chiral magnetic structures, and solitonic excitations in CsCoCl?. Measurements will be performed at multiple temperatures and energies (5?30 meV) to capture detailed spin dynamics. The study will provide key insights into the magnetic behaviour of these frustrated systems, advancing the understanding of TLAs. We request five days of beam time on the MARI spectrometer to complete this investigation.

Principal Investigator: Dr Jhuma Sannigrahi
Experimenter: Professor Subham Majumdar
Experimenter: Mr Irshad Ahamad Shaikh
Local Contact: Dr Duc Le
Experimenter: Dr Devashi Adroja

DOI: 10.5286/ISIS.E.RB2510558

ISIS Experiment Number: RB2510558

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 Jhuma Sannigrahi et al; (2025): Investigating Spin-Wave Excitations in CsCuCl? and CsCoCl? via Inelastic Neutron Scattering, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2510558

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