Non-volatile electric-field control of room-temperature ferromagnetism in Fe3GaTe2 heterostructures

Chuanyang Cai, Yao Wen (), Lei Yin, Ruiqing Cheng, Hao Wang, Xiaoqiang Feng, Liang Liu, Chao Jiang and Jun He ()
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Chuanyang Cai: Wuhan University
Yao Wen: Wuhan University
Lei Yin: Wuhan University
Ruiqing Cheng: Wuhan University
Hao Wang: Wuhan University
Xiaoqiang Feng: Wuhan University
Liang Liu: Shandong University
Chao Jiang: Henan Normal University
Jun He: Wuhan University

Nature Communications, 2025, vol. 16, issue 1, 1-13

Abstract: Abstract Van der Waals multiferroic structures hold promises for advancing the development of low-power multifunctional nanoelectronics devices, but single-phase two-dimensional multiferroic materials are limited. In this study, we constructed a room-temperature P(VDF-TrFE)/Fe3GaTe2 heterostructure (ferromagnetic layer thickness of 4.8 nm). and demonstrate significant bidirectional modulation of the Curie temperature upon application of ±90 V. Specifically, the Curie temperature decreased from 326 K to 247 K under +90 V and increased to 366 K under −90 V. Notably, we observed layer-dependent magnetic modulation, In 3-layer Fe3GaTe2, transitioning from negative to positive polarization increases Curie temperature, while thicker configurations show a decrease. This phenomenon originates from the competition between interlayer/intralayer magnetic exchange coupling driven by the electric field (density functional theory calculations), supporting non-volatile switching of the magnetization state, which is suitable for high-precision neural network computing. This discovery provides an innovative approach for developing low-power multifunctional nanoelectronics devices using two-dimensional magnetoelectric coupling structures.

Date: 2025
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DOI: 10.1038/s41467-025-62159-1

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