Issue 32, 2022

Highly-tunable ferromagnetism in Cr-doped layered van der Waals NiTe2 crystals with high air stability

Abstract

The discovery of two-dimensional (2D) van der Waals (vdW) ferromagnets has provided a broad platform for the study of spintronics and many novel physical phenomena. However, vdW ferromagnetic crystals generally have a low Curie temperature and poor air stability and their magnetic properties are difficult to modulate. As a layered Dirac semimetal, NiTe2 has excellent properties such as high electrical conductivity and high air stability. In this work, we report for the first time the introduction of ferromagnetism into NiTe2 single crystals by doping Cr atoms with the Te-flux method. By controlling the Cr content, the Curie temperature can be tuned from 210 K to 248 K and the saturation magnetic moment from 1.54 emu g−1 to 2.27 emu g−1 which is much higher than the defective magnetism caused by doping. The doped nanosheets still have extremely high air stability, in contrast with most vdW 2D ferromagnet crystals. The results provide opportunities for the study of new highly-tunable, air-stable vdW ferromagnets and their potential applications.

Graphical abstract: Highly-tunable ferromagnetism in Cr-doped layered van der Waals NiTe2 crystals with high air stability

Supplementary files

Article information

Article type
Paper
Submitted
27 May 2022
Accepted
14 Jul 2022
First published
15 Jul 2022

CrystEngComm, 2022,24, 5724-5732

Highly-tunable ferromagnetism in Cr-doped layered van der Waals NiTe2 crystals with high air stability

B. Di, P. Zhang, H. Yin, P. Han, H. Wu, G. Zhang, W. Jin, X. Wen, W. Zhang and H. Chang, CrystEngComm, 2022, 24, 5724 DOI: 10.1039/D2CE00734G

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