On the Origin of the Above-Room-Temperature Magnetism in the 2D van der Waals Ferromagnet Fe3GaTe2

2D magnetic materials have attracted growing interest driven by their unique properties and potential applications. However, the scarcity of systems exhibiting magnetism at room temperature has limited their practical implementation into functional devices. Here we focus on the van der Waals ferroma...

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Bibliographic Details
Published in:Nano letters Vol. 24; no. 26; pp. 7886 - 7894
Main Authors: Ruiz, Alberto M., Esteras, Dorye L., López-Alcalá, Diego, Baldoví, José J.
Format: Journal Article
Language:English
Published: American Chemical Society 03.07.2024
Subjects:
Letter
spintronics
first-principles calculations
Magnetism
straintronics
2D materials
ISSN:1530-6984, 1530-6992, 1530-6992
Online Access:Get full text
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Summary:2D magnetic materials have attracted growing interest driven by their unique properties and potential applications. However, the scarcity of systems exhibiting magnetism at room temperature has limited their practical implementation into functional devices. Here we focus on the van der Waals ferromagnet Fe3GaTe2, which exhibits above-room-temperature magnetism (T c = 350–380 K) and strong perpendicular anisotropy. Through first-principles calculations, we examine the magnetic properties of Fe3GaTe2 and compare them with those of Fe3GeTe2. Our calculations unveil the microscopic mechanisms governing their magnetic behavior, emphasizing the pivotal role of ferromagnetic in-plane couplings in the stabilization of the elevated T c in Fe3GaTe2. Additionally, we predict the stability, substantial perpendicular anisotropy, and high T c of the single-layer Fe3GaTe2. We also demonstrate the potential of strain engineering and electrostatic doping to modulate its magnetic properties. Our results incentivize the isolation of the monolayer and pave the way for the future optimization of Fe3GaTe2 in magnetic and spintronic nanodevices.
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ISSN:1530-6984
1530-6992
1530-6992
DOI:10.1021/acs.nanolett.4c01019