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Pressure-induced charge orders and their postulated coupling to magnetism in hexagonal multiferroic LuFe₂O₄

Physics

Pressure-induced charge orders and their postulated coupling to magnetism in hexagonal multiferroic LuFe₂O₄

F. Liu, Y. Hao, et al.

Explore the fascinating world of hexagonal LuFe₂O₄, a multiferroic material where researchers have discovered three charge-ordered phases linked to magnetic orders through pressure tuning. This groundbreaking study by Fengliang Liu, Yiqing Hao, Jinyang Ni, and collaborators sheds light on the spin-charge phase transitions and uncovers new methods to manipulate spin-charge orders.

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Playback language: English
Abstract
Hexagonal LuFe₂O₄ is a promising charge order (CO) driven multiferroic material. By tuning external pressure, researchers revealed three charge-ordered phases with suggested correlation to magnetic orders. In situ single-crystal X-ray diffraction and X-ray magnetic circular dichroism measurements, combined with density functional theory calculations, suggest that pressure-induced compression in the [Fe₂O₄] cluster is responsible for the correlated spin-charge phase transitions. Pressure-enhanced Coulomb interactions drive the CO to a less frustrated state, inducing a ferrimagnetic to antiferromagnetic transition. The results elucidate the coupling mechanism among charge, spin, and lattice degrees of freedom and provide a new way to tune spin-charge orders.
Publisher
npj Quantum Materials
Published On
Jan 07, 2023
Authors
Fengliang Liu, Yiqing Hao, Jinyang Ni, Yongsheng Zhao, Dongzhou Zhang, Gilberto Fabbris, Daniel Haskel, Shaobo Cheng, Xiaoshan Xu, Lifeng Yin, Hongjun Xiang, Jun Zhao, Xujie Lü, Wenbin Wang, Jian Shen, Wenge Yang
Tags
multiferroic
charge order
pressure tuning
phase transitions
spin-charge coupling

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