High-Pressure Neutron Diffraction Study of LaCoO                         3

Mara Capone; Christopher J. Ridley; Nicholas P. Funnell; Malcolm Guthrie; Craig L. Bull

doi:10.1002/pssa.201800736

High-Pressure Neutron Diffraction Study of LaCoO ₃

Mara Capone, Christopher J. Ridley, Nicholas P. Funnell, Malcolm Guthrie, Craig L. Bull

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3 Scopus citations

Abstract

The authors report a high-pressure variable-temperature neutron diffraction study of LaCoO ₃ , from ambient to 6 GPa at 120, 290, and 480 K. The authors see no evidence for previously-reported discontinuities in the CoO and LaO distances in the pressure and temperature ranges studied. Such discontinuities have previously been attributed to the well-documented spin-state transition of the Co ³⁺ cation (from t _2g ⁵ e _g ¹ , S = 1 → t _2g ⁶ e _g ⁰ , S = 0), the authors conclude that manifestations of the electronic configuration of LaCoO ₃ are not evident in the crystallographic structure upon pressurization. The authors also report bulk moduli for each of these temperatures as 134(2), 135(1), and 111(1) GPa, respectively, as fitted to a second-order Birch–Murnaghan equation of state.

Original language	English
Article number	1800736
Journal	Physica Status Solidi (A) Applications and Materials Science
Volume	216
Issue number	6
DOIs	https://doi.org/10.1002/pssa.201800736
State	Published - Mar 20 2019
Externally published	Yes

Funding

We acknowledge Science and Technology Facilities Council (STFC) for providing the access to the PEARL instrument at the ISIS facility (https://data.isis.stfc.ac.uk/doi/investigation/89338878). We also acknowledge the European Spallation Source (ESS) and STFC as funding institutes of the studentship of M. Capone.

Funders	Funder number
Science and Technology Facilities Council

Keywords

high-pressure
perovskite
spin-state
structure

Access to Document

10.1002/pssa.201800736

Cite this

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title = " High-Pressure Neutron Diffraction Study of LaCoO 3 ",

abstract = " The authors report a high-pressure variable-temperature neutron diffraction study of LaCoO 3 , from ambient to 6 GPa at 120, 290, and 480 K. The authors see no evidence for previously-reported discontinuities in the CoO and LaO distances in the pressure and temperature ranges studied. Such discontinuities have previously been attributed to the well-documented spin-state transition of the Co 3+ cation (from t 2g 5 e g 1 , S = 1 → t 2g 6 e g 0 , S = 0), the authors conclude that manifestations of the electronic configuration of LaCoO 3 are not evident in the crystallographic structure upon pressurization. The authors also report bulk moduli for each of these temperatures as 134(2), 135(1), and 111(1) GPa, respectively, as fitted to a second-order Birch–Murnaghan equation of state.",

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author = "Mara Capone and Ridley, {Christopher J.} and Funnell, {Nicholas P.} and Malcolm Guthrie and Bull, {Craig L.}",

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T1 - High-Pressure Neutron Diffraction Study of LaCoO 3

AU - Capone, Mara

AU - Ridley, Christopher J.

AU - Funnell, Nicholas P.

AU - Guthrie, Malcolm

AU - Bull, Craig L.

PY - 2019/3/20

Y1 - 2019/3/20

N2 - The authors report a high-pressure variable-temperature neutron diffraction study of LaCoO 3 , from ambient to 6 GPa at 120, 290, and 480 K. The authors see no evidence for previously-reported discontinuities in the CoO and LaO distances in the pressure and temperature ranges studied. Such discontinuities have previously been attributed to the well-documented spin-state transition of the Co 3+ cation (from t 2g 5 e g 1 , S = 1 → t 2g 6 e g 0 , S = 0), the authors conclude that manifestations of the electronic configuration of LaCoO 3 are not evident in the crystallographic structure upon pressurization. The authors also report bulk moduli for each of these temperatures as 134(2), 135(1), and 111(1) GPa, respectively, as fitted to a second-order Birch–Murnaghan equation of state.

AB - The authors report a high-pressure variable-temperature neutron diffraction study of LaCoO 3 , from ambient to 6 GPa at 120, 290, and 480 K. The authors see no evidence for previously-reported discontinuities in the CoO and LaO distances in the pressure and temperature ranges studied. Such discontinuities have previously been attributed to the well-documented spin-state transition of the Co 3+ cation (from t 2g 5 e g 1 , S = 1 → t 2g 6 e g 0 , S = 0), the authors conclude that manifestations of the electronic configuration of LaCoO 3 are not evident in the crystallographic structure upon pressurization. The authors also report bulk moduli for each of these temperatures as 134(2), 135(1), and 111(1) GPa, respectively, as fitted to a second-order Birch–Murnaghan equation of state.

KW - high-pressure

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