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Updated: Aug 14, 2025
09:25
Fabricating van der Waals Heterostructures with Precise Rotational Alignment
Published on: July 5, 2019
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A Room-Temperature Spin-Valve with van der Waals Ferromagnet Fe5 GeTe2 /Graphene Heterostructure
Bing Zhao1, Roselle Ngaloy1, Sukanya Ghosh2
1Department of Microtechnology and Nanoscience, Chalmers University of Technology, Göteborg, SE-41296, Sweden.
Advanced Materials (Deerfield Beach, Fla.)
|January 15, 2023
Summary
Room-temperature operation of spintronic devices using van der Waals (vdW) ferromagnets is now possible. Researchers demonstrated lateral spin-valve devices with Fe5GeTe2 and graphene, enabling ambient temperature applications.
Area of Science:
- Condensed Matter Physics
- Spintronics
- Materials Science
Background:
- Van der Waals (vdW) magnets offer new possibilities for spintronics.
- Current vdW ferromagnet devices are limited to cryogenic temperatures, hindering practical use.
Purpose of the Study:
- To demonstrate room-temperature operation of lateral spin-valve devices using vdW ferromagnets.
- To investigate the spintronic properties of Fe5GeTe2 at the graphene interface.
Main Methods:
- Fabrication of lateral spin-valve devices using Fe5GeTe2 and graphene heterostructures.
- Room-temperature spintronic measurements including spin-valve and spin-precession.
- Density functional theory (DFT) and Monte Carlo simulations.
Main Results:
- Robust room-temperature operation of lateral spin-valve devices was achieved.
- Fe5GeTe2 exhibits negative spin polarization at the graphene interface.
- Multidirectional spin polarization and canted Fe magnetic moments were observed.
Conclusions:
- Demonstrated the feasibility of ambient temperature spintronic devices using vdW magnets.
- Highlights the potential of vdW interface engineering for future spintronic applications.
- Opens new avenues for designing and utilizing vdW-magnet-based devices at room temperature.
Keywords:
2D magnetsFe
5GeTe
2Hanle spin precessiongraphenespin-valvevan der Waals heterostructuresvan der Waals magnetsMore Related Videos
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