A Room-Temperature Spin-Valve with van der Waals Ferromagnet Fe5 GeTe2 /Graphene Heterostructure
Journal article, 2023
The discovery of van der Waals (vdW) magnets opened a new paradigm for condensed matter physics and spintronic technologies. However, the operations of active spintronic devices with vdW ferromagnets are limited to cryogenic temperatures, inhibiting their broader practical applications. Here, the robust room-temperature operation of lateral spin-valve devices using the vdW itinerant ferromagnet Fe5GeTe2 in heterostructures with graphene is demonstrated. The room-temperature spintronic properties of Fe5GeTe2 are measured at the interface with graphene with a negative spin polarization. Lateral spin-valve and spin-precession measurements provide unique insights by probing the Fe5GeTe2/graphene interface spintronic properties via spin-dynamics measurements, revealing multidirectional spin polarization. Density functional theory calculations in conjunction with Monte Carlo simulations reveal significantly canted Fe magnetic moments in Fe5GeTe2 along with the presence of negative spin polarization at the Fe5GeTe2/graphene interface. These findings open opportunities for vdW interface design and applications of vdW-magnet-based spintronic devices at ambient temperatures.
spin-valve
Fe GeTe 5 2
graphene
Hanle spin precession
van der Waals magnets
van der Waals heterostructures
2D magnets
Author
Bing Zhao
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
2D-Tech
Roselle Ngaloy
2D-Tech
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Sukanya Ghosh
Uppsala University
Soheil Ershadrad
Uppsala University
Rahul Gupta
Uppsala University
Khadiza Ali
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
MAX IV Laboratory
Anamul Md Hoque
Bogdan Karpiak
2D-Tech
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Dmitrii Khokhriakov
2D-Tech
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
C. M. Polley
MAX IV Laboratory
Balasubramanian Thiagarajan
MAX IV Laboratory
Alexei Kalaboukhov
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
2D-Tech
P Svedlindh
Uppsala University
Biplab Sanyal
Uppsala University
Saroj Prasad Dash
2D-Tech
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Advanced Materials
09359648 (ISSN) 15214095 (eISSN)
Vol. 35 16 2209113Graphene Core Project 3 (Graphene Flagship)
European Commission (EC) (EC/H2020/881603), 2020-04-01 -- 2023-03-31.
Spintronics with Topological Quantum Material and Magnetic Heterostructures
Swedish Research Council (VR) (2021-04821), 2022-01-01 -- 2025-12-31.
2D material-based technology for industrial applications (2D-TECH)
VINNOVA (2019-00068), 2020-05-01 -- 2024-12-31.
GKN Aerospace Sweden (2D-tech), 2021-01-01 -- 2024-12-31.
2Dimensional van der Waals Spin-Orbit Torque Technology
Swedish Research Council (VR) (2021-05925), 2021-12-01 -- 2024-11-30.
Subject Categories
Other Physics Topics
Other Materials Engineering
Condensed Matter Physics
DOI
10.1002/adma.202209113
PubMed
36641649