ISIS Neutron and Muon Source Data Journal

High pressure charge transitions in PbCoO3

Abstract: PbCoO3 used to be the “missing link” in the PbMO3 perovskite series. PbCoO3 was recently synthesized by the Azuma group using high-pressure synthesis at 12 GPa. NPD at JPARC shows that it has the exciting and unexpected valence distribution of Pb2+Pb4+3Co2+2Co3+2O12 where Pb in the A-site and Co in the B-site of perovskite ABO3 both have charge ordering leading to the so-called A-site ordered double perovskite structure. The complex Pb2+0.25Pb4+0.75Co2+0.5Co3+0.5O3 valence distribution is expected to change with perturbations such as pressure and chemical modifications. A preliminary high pressure SXRD experiment found a 0.5 % volume drop at 5 GPa. We think that this corresponds to a Pb-Co charge transfer, but it needs to be confirmed by NPD. We request 3 days on PEARL for an initial room temperature experiment from near ambient up to 10 GPa pressure.

Principal Investigator: Professor Paul Attfield
Experimenter: Mr Hajime Yamamoto
Experimenter: Professor Masakai Azuma
Experimenter: Mr Kengo Oka
Experimenter: Dr Yuki Sakai
Local Contact: Dr Nicholas Funnell
Experimenter: Mr Takumi Nishikubo
Experimenter: Mr Takeshi Asakura
Experimenter: Mr Yuichito Hattori
Experimenter: Mr Calum Lithgow

DOI: 10.5286/ISIS.E.RB1620274

ISIS Experiment Number: RB1620274

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; (2016): High pressure charge transitions in PbCoO3, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1620274

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