Magnetic properties manipulation of CrTe2 bilayer through strain and self-intercalation

Two-dimensional van der Waals magnetic crystals have been attracting significant research interest in recent years, and the manipulation of their magnetism is important for understanding their physical property and achieving their actual applications. Here, we systematically studied the manipulation...

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Published in:Applied physics letters 2021-10, Vol.119 (16)
Main Authors: Li, Qiu-Qiu, Li, Si, Wu, Dan, Ding, Zhong-Ke, Cao, Xuan-Hao, Huang, Lin, Pan, Hui, Li, Bo, Chen, Ke-Qiu, Duan, Xi-Dong
Format: Article
Language:English
Subjects:
Antiferromagnetism
Applied physics
Coupling
Ferromagnetism
Ground state
Intercalation
Interlayers
Magnetic properties
Magnetism
Plane strain
Transistors
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cited_by cdi_FETCH-LOGICAL-c327t-293ccf41f566a630bfd3678d6e8188aab8293ec620eae0b76d0c01f998b3231d3
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container_issue 16
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container_title Applied physics letters
container_volume 119
creator Li, Qiu-Qiu
Li, Si
Wu, Dan
Ding, Zhong-Ke
Cao, Xuan-Hao
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Pan, Hui
Li, Bo
Chen, Ke-Qiu
Duan, Xi-Dong
description Two-dimensional van der Waals magnetic crystals have been attracting significant research interest in recent years, and the manipulation of their magnetism is important for understanding their physical property and achieving their actual applications. Here, we systematically studied the manipulation of magnetic properties of a CrTe2 bilayer through in-plane strain and self-intercalation. We found that the magnetic ground state of the CrTe2 bilayer varies from intralayer antiferromagnetic coupling to ferromagnetic coupling and then to interlayer antiferromagnetic coupling when the strain changes from −6% to 4%, which should result from the coupling between intralayer Cr atoms tuned from direct Cr–Cr exchange to indirect Cr–Te–Cr superexchange. The magnetic easy axis of the CrTe2 bilayer varies from the in-plane to the out-of-plane owing to the change of pz orbital occupation from Te atoms near the Fermi level. Moreover, the magnetic ground states of different Cr-intercalated concentrations for the CrTe2 bilayer are all ferromagnetic, and the magnetic easy axis is in-plane, which are different from the intrinsic one. Our results indicate that the magnetic property of the CrTe2 bilayer is sensitive to the in-plane strain and self-intercalation, which provides important guidance for the further magnetic manipulation of the CrTe2 bilayer in theoretical research and application of magnetic strain sensors and spin transistors.
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subjects Antiferromagnetism
Applied physics
Coupling
Ferromagnetism
Ground state
Intercalation
Interlayers
Magnetic properties
Magnetism
Plane strain
Transistors
title Magnetic properties manipulation of CrTe2 bilayer through strain and self-intercalation
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