ISIS Neutron and Muon Source Data Journal

Structural and magnetic orders in Ga-V oxide spinels

Abstract: In certain materials, notably with the spinel structure, orbital ordering can result in the formation of a ground state with electrons delocalising between small numbers of adjacent cations, called ?orbital molecules?. Two new spinels, GaV2O4 (a = 8.3130(5) Å) and Li0.5Ga0.5V2O4 (a = 8.3129(1) Å), have recently been synthesised by high temperature solid-state reactions as candidate orbital molecule materials. GaV2O4 is paramagnetic down to 4 K, but a sharp magnetic ordering transition is observed at 15 K for Li0.5Ga0.5V2O4.We request 2 days on HRPD to study the crystal and magnetic structures of GaV2O4 and Li0.5Ga0.5V2O4, over the temperature range 4-300 K. Neutrons are required to refine cation occupancies and observe magnetic order, and the high resolution of HRPD is needed to observe any subtle superstructures associated with orbital/spin orders.

Principal Investigator: Professor Paul Attfield
Local Contact: Dr Kevin Knight
Local Contact: Dr Kevin Knight
Experimenter: Mr Alexander Browne
Experimenter: Dr Elise Pachoud
Experimenter: Dr James Cumby

DOI: 10.5286/ISIS.E.RB1520014

ISIS Experiment Number: RB1520014

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 Paul Attfield et al; (2015): Structural and magnetic orders in Ga-V oxide spinels, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1520014

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