Subtle Structural Changes in LaFeO3 at High Pressure

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

doi:10.1002/pssb.202000413

Subtle Structural Changes in LaFeO₃ at High Pressure

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

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

High-pressure neutron diffraction measurements of polycrystalline LaFeO₃ are collected up to 5.5 and 6.4 GPa at 290 and 110 K, respectively. The bulk moduli are determined as B₀(290 K) = 170(3) GPa and B₀(110 K) = 175(1) GPa. The unit cell is found to compress anisotropically at both temperatures with the a-axis compressing preferentially. A crossover in lattice parameters is observed, from a > c to c > a, at 2 GPa at 290 K and at 1.7 GPa at 110 K. The magnetic moment remains unchanged over the pressure range investigated, with a value of 4.4 μ_B and 4 μ_B at 110 and 290 K, respectively. Analysis of the octahedral tilting angles and the spontaneous lattice strains shows an increased orthorhombic distortion with pressure, but shows no trend toward a change in symmetry. High-pressure Raman spectroscopy measurements at room temperature are in agreement with the diffraction data.

Original language	English
Article number	2000413
Journal	Physica Status Solidi (B) Basic Research
Volume	258
Issue number	2
DOIs	https://doi.org/10.1002/pssb.202000413
State	Published - Feb 2021
Externally published	Yes

Funding

The authors acknowledge the Science and Technology Facilities Council (STFC) for providing neutron beamtime on the Polaris (http://doi.org/10.5286/ISIS.E.RB1990062-1) and PEARL (https://doi.org/10.5286/ISIS.E.RB1920055) instruments at the ISIS Neutron and Muon Source, and thank the Materials Characterisation Laboratory at the ISIS Neutron and Muon Source for assistance with the SQUID and PXRD measurements. The authors also acknowledge the European Spallation Source and STFC for funding the studentship of M. Capone.

Funders	Funder number
Science and Technology Facilities Council

Keywords

diffraction
high pressure
perovskite

Access to Document

10.1002/pssb.202000413

Cite this

@article{aa57be3aa7f44daf8bdff62dc1fc4537,

title = "Subtle Structural Changes in LaFeO3 at High Pressure",

abstract = "High-pressure neutron diffraction measurements of polycrystalline LaFeO3 are collected up to 5.5 and 6.4 GPa at 290 and 110 K, respectively. The bulk moduli are determined as B0(290 K) = 170(3) GPa and B0(110 K) = 175(1) GPa. The unit cell is found to compress anisotropically at both temperatures with the a-axis compressing preferentially. A crossover in lattice parameters is observed, from a > c to c > a, at 2 GPa at 290 K and at 1.7 GPa at 110 K. The magnetic moment remains unchanged over the pressure range investigated, with a value of 4.4 μB and 4 μB at 110 and 290 K, respectively. Analysis of the octahedral tilting angles and the spontaneous lattice strains shows an increased orthorhombic distortion with pressure, but shows no trend toward a change in symmetry. High-pressure Raman spectroscopy measurements at room temperature are in agreement with the diffraction data.",

keywords = "diffraction, high pressure, perovskite",

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

note = "Publisher Copyright: {\textcopyright} 2020 The Authors. Published by Wiley-VCH GmbH",

year = "2021",

month = feb,

doi = "10.1002/pssb.202000413",

language = "English",

volume = "258",

journal = "Physica Status Solidi (B) Basic Research",

issn = "0370-1972",

publisher = "wiley",

number = "2",

}

TY - JOUR

T1 - Subtle Structural Changes in LaFeO3 at High Pressure

AU - Capone, Mara

AU - Ridley, Christopher J.

AU - Funnell, Nicholas P.

AU - Guthrie, Malcolm

AU - Bull, Craig L.

PY - 2021/2

Y1 - 2021/2

N2 - High-pressure neutron diffraction measurements of polycrystalline LaFeO3 are collected up to 5.5 and 6.4 GPa at 290 and 110 K, respectively. The bulk moduli are determined as B0(290 K) = 170(3) GPa and B0(110 K) = 175(1) GPa. The unit cell is found to compress anisotropically at both temperatures with the a-axis compressing preferentially. A crossover in lattice parameters is observed, from a > c to c > a, at 2 GPa at 290 K and at 1.7 GPa at 110 K. The magnetic moment remains unchanged over the pressure range investigated, with a value of 4.4 μB and 4 μB at 110 and 290 K, respectively. Analysis of the octahedral tilting angles and the spontaneous lattice strains shows an increased orthorhombic distortion with pressure, but shows no trend toward a change in symmetry. High-pressure Raman spectroscopy measurements at room temperature are in agreement with the diffraction data.

AB - High-pressure neutron diffraction measurements of polycrystalline LaFeO3 are collected up to 5.5 and 6.4 GPa at 290 and 110 K, respectively. The bulk moduli are determined as B0(290 K) = 170(3) GPa and B0(110 K) = 175(1) GPa. The unit cell is found to compress anisotropically at both temperatures with the a-axis compressing preferentially. A crossover in lattice parameters is observed, from a > c to c > a, at 2 GPa at 290 K and at 1.7 GPa at 110 K. The magnetic moment remains unchanged over the pressure range investigated, with a value of 4.4 μB and 4 μB at 110 and 290 K, respectively. Analysis of the octahedral tilting angles and the spontaneous lattice strains shows an increased orthorhombic distortion with pressure, but shows no trend toward a change in symmetry. High-pressure Raman spectroscopy measurements at room temperature are in agreement with the diffraction data.

KW - diffraction

KW - high pressure

KW - perovskite

UR - http://www.scopus.com/inward/record.url?scp=85092020044&partnerID=8YFLogxK

U2 - 10.1002/pssb.202000413

DO - 10.1002/pssb.202000413

M3 - Article

AN - SCOPUS:85092020044

SN - 0370-1972

VL - 258

JO - Physica Status Solidi (B) Basic Research

JF - Physica Status Solidi (B) Basic Research

IS - 2

M1 - 2000413

ER -