ISIS Neutron and Muon Source Data Journal

Investigation of complex magnetic ground state of effective spin ? ½ system CeVO4 via neutron powder diffraction

Abstract: Rare-earth systems with effective spin (Jeff) moments are known to exhibit complex magnetic ground states, often marked by short-range correlations, persistent spin dynamics, and possible quantum criticality. Here, we propose neutron powder diffraction measurements on CeVO4 to probe its unconventional magnetic ground state arising from strongly interacting Jeff = Ce3+ moments. The nature of Jeff state at low temperatures is confirmed from inelastic neutron scattering (INS) measurements. Heat capacity and ac susceptibility shows the signatures of long-range order (LRO) at 90 mK, but muon spin relaxation ( SR) down to 50 mK reveals persistent spin dynamics with no evidence of static magnetism. Further, SR data reveals two distinct relaxations, possibly linked to short-range correlations or nuclear fields. By doing neutron powder diffraction at three temperatures (50 mK, 0.5 K and 4 K), we want to investigate: (i) the presence of magnetic Bragg peaks and solve the magnetic structure if LRO exists below 90 mK, or (ii) in case of broad magnetic peaks and/or absence of peaks, a possibility of quantum critical point (QCP) resulting in absence of SR. The outcomes of this investigation are expected to resonate strongly with ongoing theoretical works focused on reduced moment ordering and quantum criticality driven dynamic ground state.

Principal Investigator: Dr Deepshikha Jaiswal Nagar
Local Contact: Dr Pascal Manuel
Experimenter: Dr Dmitry Khalyavin
Experimenter: Dr Dheeraj -
Experimenter: Dr Devashi Adroja

DOI: 10.5286/ISIS.E.RB2610010

ISIS Experiment Number: RB2610010

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
Select the data format above to find out more about it.

Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Deepshikha Jaiswal Nagar et al; (2026): Investigation of complex magnetic ground state of effective spin ? ½ system CeVO4 via neutron powder diffraction, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2610010

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