ISIS Neutron and Muon Source Data Journal

Crystal field levels in scandium-doped spin ice

Abstract: We have determined the defect structure of scandium-doped holmium titanate using diffuse neutron scattering, and we find evidence for charge-compensating oxygen vacancies on so-called O(1) sites. According to crystal electric field (CEF) calculations using a point charge model, an O(1) vacancy is expected to lead to the four neighbouring holmium ions adopting a non-magnetic singlet ground state. We now propose to test our theoretical predictions of the CEF energy levels of scandium-doped holmium titanate using inelastic neutron scattering on MARI. Determination of the CEF energy level scheme will allow us to understand the effects of doping on the single-ion magnetism, and to simulate the collective behaviour of this novel magnetic system.

Principal Investigator: Professor Jon Goff
Local Contact: Dr Tatiana Guidi
Experimenter: Dr David Voneshen
Experimenter: Dr Tomas Stephen Northam de la Fuente
Experimenter: Dr Claudio Castelnovo
Local Contact: Dr Duc Le
Experimenter: Dr Lucile Mangin-Thro
Experimenter: Dr Dharmalingan Prabhakaran

DOI: 10.5286/ISIS.E.RB2000159

ISIS Experiment Number: RB2000159

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:
Professor Jon Goff et al; (2020): Crystal field levels in scandium-doped spin ice, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2000159

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