Air-Stable 2D Intrinsic Ferromagnetic Ta3FeS6 with Four Months Durability

Jianwei Su; Mingshan Wang; Guiheng Liu; Huiqiao Li; Junbo Han; Tianyou Zhai

doi:10.1002/advs.202001722

Air-Stable 2D Intrinsic Ferromagnetic Ta₃FeS₆ with Four Months Durability

Adv Sci (Weinh). 2020 Oct 13;7(22):2001722. doi: 10.1002/advs.202001722. eCollection 2020 Nov.

Authors

Jianwei Su¹, Mingshan Wang², Guiheng Liu¹, Huiqiao Li¹, Junbo Han², Tianyou Zhai¹

Affiliations

¹ State Key Laboratory of Material Processing and Die and Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology (HUST) Wuhan 430074 P. R. China.
² Wuhan National High Magnetic Field Center and Department of Physics Huazhong University of Science and Technology (HUST) Wuhan 430074 P. R. China.

Abstract

2D ferromagnetic materials provide an important platform for the fundamental magnetic research at atomic-layer thickness which has great prospects for next-generation spintronic devices. However, the currently discovered 2D ferromagnetic materials (such as, CrI₃, Cr₂Ge₂Te₆, and Fe₃GeTe₂) suffer from poor air stability, which hinders their practical application. Herein, intrinsic long-range ferromagnetic order in 2D Ta₃FeS₆ is reported, which exhibits ultrahigh stability under the atmospheric environment. The intrinsic ferromagnetism of few-layer Ta₃FeS₆ is revealed by polar magneto-optical Kerr effect measurement, which exhibits giant MOKE response and has Curie temperature of ≈80 K. More importantly, few-layer Ta₃FeS₆ nanosheet exhibits excellent air stability and its ferromagnetism remains unchanged after 4 months of aging under the atmosphere. This work enriches the family of 2D ferromagnetic materials, which will facilitate the research progress of spintronics.

Keywords: 2D materials; MOKE; Ta3FeS6; air‐stable 2D ferromagnetism; ferromagnetism.