Journal
NANO LETTERS
Volume 19, Issue 12, Pages 8806-8810Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.9b03614
Keywords
2D magnet; vanadium selenide; molecular-beam epitaxy; anomalous Hall effect; X-ray magnetic circular dichroism
Categories
Funding
- Japan Society for the Promotion of Science (JSPS)
- Murata Science Foundation
- JSPS through Program for Leading Graduate Schools (MERIT)
- [19H05602]
- [19H02593]
- [19H00653]
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The discoveries of intrinsic ferromagnetism in atomically thin van der Waals crystals have opened a new research field enabling fundamental studies on magnetism at two-dimensional (2D) limit as well as development of magnetic van der Waals heterostructures. Currently, a variety of 2D ferromagnetism has been explored mainly by mechanically exfoliating originally ferromagnetic (FM) van der Waals crystals, while a bottom-up approach by thin-film growth technique has demonstrated emergent 2D ferromagnetism in a variety of originally non-FM van der Waals materials. Here we demonstrate that V5Se8 epitaxial thin films grown by molecular-beam epitaxy exhibit emergent 2D ferromagnetism with intrinsic spin polarization of the V 3d electrons despite that the bulk counterpart is originally antiferromagnetic. Moreover, thickness-dependence measurements reveal that this newly developed 2D ferromagnet could be classified as an itinerant 2D Heisenberg ferromagnet with weak magnetic anisotropy, broadening a lineup of 2D magnets to those potentially beneficial for future spintronics applications.
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