ISIS Neutron and Muon Source Data Journal

High pressure charge and magnetic transitions in PbCrO3

Abstract: The high pressure perovskite PbCrO3 has been known since the 1960’s but the electronic properties were controversial. The average structure is a cubic Pm-3m perovskite but a recent study revealed a charge ordering as Pb2+0.5Pb4+0.5Cr3+O3 with a ~3 x 3 x 3 Pb2+/Pb4+ ordered superstructure over small correlation lengths. A large pressure-induced volume collapse of 9.8% at ~2 GPa is due to a insulator-metal transition accompanying the charge transfer to high pressure configuration Pb2+Cr4+O3. Neutron diffraction is required to study structural and magnetic changes accompanying the unusual insulator to metal change in PbCrO3. Neutrons will show how TN (= 240 K at ambient P) changes with pressure, whether the G-type antiferromagnetism is suppressed at the transition, and whether the length scale for 3-fold local superstructure changes with pressure approaching the transition.

Principal Investigator: Professor Paul Attfield
Experimenter: Mr Takeshi Asakura
Experimenter: Mr Yuichito Hattori
Experimenter: Dr Yuki Sakai
Experimenter: Mr Kengo Oka
Experimenter: Mr Takumi Nishikubo
Local Contact: Dr Craig Bull
Experimenter: Dr Angel Arevalo Lopez
Experimenter: Professor Masakai Azuma
Experimenter: Mr Hajime Yamamoto
Experimenter: Mr Calum Lithgow

DOI: 10.5286/ISIS.E.RB1610035

ISIS Experiment Number: RB1610035

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 and magnetic transitions in PbCrO3, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1610035

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