Enhanced Coupling Between Soft Ferromagnetism and Displacive Ferroelectricity in the Pb-Site Modified PbFe<inf>1/2</inf>Nb<inf>1/2</inf>O<inf>3</inf>

Park, JH; Cho, JH; Lee, NJ; Lee, HJ; Lee, JH; Lee, GJ; Marlton, FP; Suzuki, M; Hinterstein, M; Oh, YS; Choi, JW; Hwang, GT; Lee, JH; Kim, S; Kim, KH; Jo, W

Enhanced Coupling Between Soft Ferromagnetism and Displacive Ferroelectricity in the Pb-Site Modified PbFe<inf>1/2</inf>Nb<inf>1/2</inf>O<inf>3</inf>

Park, JH Cho, JH Lee, NJ Lee, HJ Lee, JH Lee, GJ Marlton, FP Suzuki, M Hinterstein, M Oh, YS Choi, JW Hwang, GT Lee, JH Kim, S Kim, KH Jo, W

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Publisher:: WILEY
Publication Type:: Journal Article
Citation:: Advanced Electronic Materials, 2024
Issue Date:: 2024-01-01

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Field	Value	Language
dc.contributor.author	Park, JH
dc.contributor.author	Cho, JH
dc.contributor.author	Lee, NJ
dc.contributor.author	Lee, HJ
dc.contributor.author	Lee, JH
dc.contributor.author	Lee, GJ
dc.contributor.author	Marlton, FP
dc.contributor.author	Suzuki, M
dc.contributor.author	Hinterstein, M
dc.contributor.author	Oh, YS
dc.contributor.author	Choi, JW
dc.contributor.author	Hwang, GT
dc.contributor.author	Lee, JH
dc.contributor.author	Kim, S
dc.contributor.author	Kim, KH
dc.contributor.author	Jo, W
dc.date.accessioned	2025-01-23T06:00:23Z
dc.date.available	2025-01-23T06:00:23Z
dc.date.issued	2024-01-01
dc.identifier.citation	Advanced Electronic Materials, 2024
dc.identifier.issn	2199-160X
dc.identifier.issn	2199-160X
dc.identifier.uri	http://hdl.handle.net/10453/184118
dc.description.abstract	Albeit having great potential toward unprecedented type of applications such as magnetoelectric (ME) sensors and memories, practically useful single-phase multiferroics that show large coupling between ferromagnetism and ferroelectricity at ambient temperatures are still lacking. Here, the discovery of a new type of perovskite ferroelectrics (Pb,M)(Fe1/2Nb1/2)O3 (M = Fe, Co, Ni) is reported with a magnetically-active metal ion introduced into a cuboctahedrally-coordinated Pb position, which exhibits enhanced ME coupling owing to the development of simultaneous soft-ferromagnetism and lone-pair ferroelectricity persistent above room temperature. These Pb-site engineered (Pb,M)(Fe1/2Nb1/2)O3 perovskites exhibit a ME coupling coefficient of ≈40–60 ps m−1, a saturated electric polarization of 14–17 µC cm−2 and a saturation magnetization of 0.15–0.3 µB f.u−1. X-ray absorption spectroscopy combined with first-principles calculations demonstrates that the induced ferromagnetism originates from the ferromagnetic superexchange interaction coming from ≈90° bonding between the magnetic ions at the Pb site. The present discovery of the enhanced ME coupling in the Pb-site engineered perovskite ferroelectrics may provide unforeseen opportunities for applying conventional displacive ferroelectricity in the field of spintronics where ferromagnetism is essentially required.
dc.language	English
dc.publisher	WILEY
dc.relation.ispartof	Advanced Electronic Materials
dc.relation.isbasedon	10.1002/aelm.202400370
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0906 Electrical and Electronic Engineering, 0912 Materials Engineering
dc.subject.classification	3403 Macromolecular and materials chemistry
dc.subject.classification	4016 Materials engineering
dc.title	Enhanced Coupling Between Soft Ferromagnetism and Displacive Ferroelectricity in the Pb-Site Modified PbFe<inf>1/2</inf>Nb<inf>1/2</inf>O<inf>3</inf>
dc.type	Journal Article
utslib.for	0906 Electrical and Electronic Engineering
utslib.for	0912 Materials Engineering
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Science
pubs.organisational-group	University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	open_access	*
dc.rights.license	This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/
dc.date.updated	2025-01-23T06:00:21Z
pubs.publication-status	Published

Abstract:

Albeit having great potential toward unprecedented type of applications such as magnetoelectric (ME) sensors and memories, practically useful single-phase multiferroics that show large coupling between ferromagnetism and ferroelectricity at ambient temperatures are still lacking. Here, the discovery of a new type of perovskite ferroelectrics (Pb,M)(Fe1/2Nb1/2)O3 (M = Fe, Co, Ni) is reported with a magnetically-active metal ion introduced into a cuboctahedrally-coordinated Pb position, which exhibits enhanced ME coupling owing to the development of simultaneous soft-ferromagnetism and lone-pair ferroelectricity persistent above room temperature. These Pb-site engineered (Pb,M)(Fe1/2Nb1/2)O3 perovskites exhibit a ME coupling coefficient of ≈40–60 ps m−1, a saturated electric polarization of 14–17 µC cm−2 and a saturation magnetization of 0.15–0.3 µB f.u−1. X-ray absorption spectroscopy combined with first-principles calculations demonstrates that the induced ferromagnetism originates from the ferromagnetic superexchange interaction coming from ≈90° bonding between the magnetic ions at the Pb site. The present discovery of the enhanced ME coupling in the Pb-site engineered perovskite ferroelectrics may provide unforeseen opportunities for applying conventional displacive ferroelectricity in the field of spintronics where ferromagnetism is essentially required.

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http://hdl.handle.net/10453/184118