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.
Local distortions and orbital disorder in ultra-high A-site variance perovskite Ce0.5Ba0.5MnO3
Abstract: Perovskites are highly sensitive to their chemical compositions. In particular, the cation distribution on the A-site strongly affects their properties. Chemical disorder at the A-site, characterised by the variance associated with the ionic radii of the cations, also has a profound effect. We have synthesised a new high-pressure perovskite, Ce4+Ba2+Mn3+2O6, with the express aim of stabilising a combination of cation layering and octahedral tilting, allowing stabilisation of magnetoelectric coupling. However, it is seen to remain cubic down to temperatures as low as 1.5 K, suggesting the necessity of local distortions. Additionally, Ce0.5Ba0.5MnO3 offers an ideal analogue to the pseudo-cubic state seen in LaMnO3, with widely-discussed order-disorder transitions. It has a similar average A-site ionic radius and valence state, and remains in this pseudo-cubic state down to much lower temperatures. Our previous experiment on Polaris (2420349) collected room temperature total scattering data of Ce0.5Ba0.5MnO3. Symmetry-adapted mode analysis has been undertaken, and suggests the presence of a rare tilt pattern combining both in- and out-of-phase tilts in the same axis, seen in very few perovskite structures. This variable-temperature continuation experiment would allow deconvolution of thermal broadening and magnetic order from structural distortions, allowing more confidence in the identification of this tilt pattern.
Principal Investigator: Dr Mark Senn
Experimenter: Mr Jaskaran Singh Mangat
Experimenter: Miss Elizabeth Arnold
Local Contact: Dr Helen Playford
Experimenter: Dr Cameron Wilson
DOI: 10.5286/ISIS.E.RB2610232
ISIS Experiment Number: RB2610232
| Part DOI | Instrument | Public release date | Download Link |
|---|---|---|---|
| 10.5286/ISIS.E.RB2610232-1 | POLARIS | 11 June 2029 | Download |
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 Mark Senn et al; (2026): Local distortions and orbital disorder in ultra-high A-site variance perovskite Ce0.5Ba0.5MnO3, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2610232
Data is released under the CC-BY-4.0 license.
