Nonvolatile switchable half-metallicity and magnetism in the MXene Hf2MnC2O2/Sc2CO2 multiferroic heterostructure

Nonvolatile electrical control of two-dimensional (2D) van der Waals (vdW) magnetism is important for spintronic devices. Here, using first-principles calculations, we systematically investigated the magnetic properties of the MXene Hf2MnC2O2 combined with the ferroelectric MXene Sc2CO2. When flippi...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2024-02, Vol.26 (6), p.5323-5332
Main Authors: Wu, Changwei, Sun, Shanwei, Gong, Weiping, Li, Jiangyu, Wang, Xiao
Format: Article
Language:English
Subjects:
Electric polarization
Ferroelectricity
Ferromagnetism
First principles
Heterostructures
Magnetic properties
Magnetism
Metallicity
Monolayers
Multiferroic materials
MXenes
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Summary:Nonvolatile electrical control of two-dimensional (2D) van der Waals (vdW) magnetism is important for spintronic devices. Here, using first-principles calculations, we systematically investigated the magnetic properties of the MXene Hf2MnC2O2 combined with the ferroelectric MXene Sc2CO2. When flipping the electric polarization of Sc2CO2, a transition between a semiconductor and a half-metal occurs in the Hf2MnC2O2 monolayer. Moreover, the ferromagnetic exchange parameter J1 can be enhanced to 9.67 meV under polarized P↑ of Sc2CO2, much larger than those of the pristine Hf2MnC2O2 monolayer and Hf2MnC2O2/Sc2CO2-P↓. In addition, the easy magnetization axis of the Hf2MnC2O2 monolayer is also dependent on the polarization orientation of Sc2CO2. Our results indicate a multiferroic heterostructure based on MXenes, offering an effective way for obtaining nonvolatile electrical control of electronic and magnetic properties.
ISSN:1463-9076
1463-9084
DOI:10.1039/d3cp04847k