Above-Room-Temperature Ferromagnetism Regulation in Two-Dimensional Heterostructures by van der Waals Interfacial Magnetochemistry

Gaojie Zhang; Hao Wu; Li Yang; Zheng Chen; Wen Jin; Bichen Xiao; Wenfeng Zhang; Changsheng Song; Haixin Chang

doi:10.1021/jacs.4c13391

Above-Room-Temperature Ferromagnetism Regulation in Two-Dimensional Heterostructures by van der Waals Interfacial Magnetochemistry

J Am Chem Soc. 2024 Nov 30. doi: 10.1021/jacs.4c13391. Online ahead of print.

Authors

Gaojie Zhang^{1

2}, Hao Wu^{1

2}, Li Yang^{1

2}, Zheng Chen³, Wen Jin^{1

2}, Bichen Xiao^{1

2}, Wenfeng Zhang^{1

2

4}, Changsheng Song³, Haixin Chang^{1

2

4}

Affiliations

¹ State Key Laboratory of Material Processing and Die & Mold Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
² Wuhan National High Magnetic Field Center and Institute for Quantum Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
³ Department of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, China.
⁴ Shenzhen R&D Center of Huazhong University of Science and Technology, Shenzhen 518000, China.

PMID: 39614815
DOI: 10.1021/jacs.4c13391

Abstract

Most methods for regulating physical and chemical properties of materials involve the breaking and formation of chemical bonds, which inevitably change local structures. Two-dimensional (2D) ferromagnets are critical for spintronic memory and quantum devices, but most of them maintain ferromagnetism at low temperature, and multiaspect control of 2D ferromagnetism at room temperature or above is still missing. Here, we report a nondestructive, van der Waals (vdW) interfacial magnetochemistry strategy for above-room-temperature, multiaspect 2D ferromagnetism regulation. By vdW coupling nonmagnetic MoS₂, WSe₂, or Bi_1.5Sb_0.5Te_1.7Se_1.3 with 2D vdW ferromagnet Fe₃GaTe₂, the Curie temperature is enhanced up to 400 K, best for 2D ferromagnets, with 26.8% tuning of room-temperature perpendicular magnetic anisotropy and an unconventional anomalous Hall effect up to 340 K. These phenomena originate from changes in magnetic exchange interactions and magnetic anisotropy energy by interfacial charge transfer and spin-orbit coupling. This work opens a pathway for engineering multifunctional 2D heterostructures by vdW interfacial magnetochemistry.