The magnetoelectric effect in LiFePO4 – revisited

Ellen Fogh; Bastian Klemke; Alexandre Pages; Jiying Li; David Vaknin; Henrik M. Rønnow; Niels B. Christensen; Rasmus Toft-Petersen

doi:10.1016/j.physb.2022.414380

The magnetoelectric effect in LiFePO₄ – revisited

Ellen Fogh^*, Bastian Klemke, Alexandre Pages, Jiying Li, David Vaknin, Henrik M. Rønnow, Niels B. Christensen, Rasmus Toft-Petersen

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

We study the magnetoelectric effect in LiFePO₄ using the pyrocurrent method to determine the magnetic-field-induced electric polarization as a function of temperature for various applied magnetic field strengths. We discover a diagonal magnetoelectric tensor element not previously reported. This new coupling reflects the emergence of an electric polarization along a induced by a magnetic field along the same direction and is consistent with the symmetry-imposed requirements for the small canting components of the magnetic ground state reported for this compound. Our observation is thus further evidence for a ground state which is not supported by the space group Pnma as originally assigned to LiFePO₄.

Original language	English
Article number	414380
Journal	Physica B: Condensed Matter
Volume	648
Number of pages	4
ISSN	0921-4526
DOIs	https://doi.org/10.1016/j.physb.2022.414380
Publication status	Published - 2023

Keywords

Magnetic symmetry
Magnetoelectric effect
Phase transition
Pyroelectric current

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title = "The magnetoelectric effect in LiFePO4 – revisited",

abstract = "We study the magnetoelectric effect in LiFePO4 using the pyrocurrent method to determine the magnetic-field-induced electric polarization as a function of temperature for various applied magnetic field strengths. We discover a diagonal magnetoelectric tensor element not previously reported. This new coupling reflects the emergence of an electric polarization along a induced by a magnetic field along the same direction and is consistent with the symmetry-imposed requirements for the small canting components of the magnetic ground state reported for this compound. Our observation is thus further evidence for a ground state which is not supported by the space group Pnma as originally assigned to LiFePO4.",

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author = "Ellen Fogh and Bastian Klemke and Alexandre Pages and Jiying Li and David Vaknin and R{\o}nnow, {Henrik M.} and Christensen, {Niels B.} and Rasmus Toft-Petersen",

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T1 - The magnetoelectric effect in LiFePO4 – revisited

AU - Fogh, Ellen

AU - Klemke, Bastian

AU - Pages, Alexandre

AU - Li, Jiying

AU - Vaknin, David

AU - Rønnow, Henrik M.

AU - Christensen, Niels B.

AU - Toft-Petersen, Rasmus

PY - 2023

Y1 - 2023

N2 - We study the magnetoelectric effect in LiFePO4 using the pyrocurrent method to determine the magnetic-field-induced electric polarization as a function of temperature for various applied magnetic field strengths. We discover a diagonal magnetoelectric tensor element not previously reported. This new coupling reflects the emergence of an electric polarization along a induced by a magnetic field along the same direction and is consistent with the symmetry-imposed requirements for the small canting components of the magnetic ground state reported for this compound. Our observation is thus further evidence for a ground state which is not supported by the space group Pnma as originally assigned to LiFePO4.

AB - We study the magnetoelectric effect in LiFePO4 using the pyrocurrent method to determine the magnetic-field-induced electric polarization as a function of temperature for various applied magnetic field strengths. We discover a diagonal magnetoelectric tensor element not previously reported. This new coupling reflects the emergence of an electric polarization along a induced by a magnetic field along the same direction and is consistent with the symmetry-imposed requirements for the small canting components of the magnetic ground state reported for this compound. Our observation is thus further evidence for a ground state which is not supported by the space group Pnma as originally assigned to LiFePO4.

KW - Magnetic symmetry

KW - Magnetoelectric effect

KW - Phase transition

KW - Pyroelectric current

U2 - 10.1016/j.physb.2022.414380

DO - 10.1016/j.physb.2022.414380

M3 - Journal article

AN - SCOPUS:85139821339

SN - 0921-4526

VL - 648

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

M1 - 414380

ER -