A Room-Temperature Spin-Valve with van der Waals Ferromagnet Fe5 GeTe2 /Graphene Heterostructure
Artikel i vetenskaplig tidskrift, 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
Författare
Bing Zhao
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
2D-Tech
Roselle Ngaloy
2D-Tech
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Sukanya Ghosh
Uppsala universitet
Soheil Ershadrad
Uppsala universitet
Rahul Gupta
Uppsala universitet
Khadiza Ali
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Max IV-laboratoriet
Anamul Md Hoque
Bogdan Karpiak
2D-Tech
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Dmitrii Khokhriakov
2D-Tech
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
C. M. Polley
Max IV-laboratoriet
Balasubramanian Thiagarajan
Max IV-laboratoriet
Alexei Kalaboukhov
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
2D-Tech
P Svedlindh
Uppsala universitet
Biplab Sanyal
Uppsala universitet
Saroj Prasad Dash
2D-Tech
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Advanced Materials
09359648 (ISSN) 15214095 (eISSN)
Vol. 35 16 2209113Graphene Core Project 3 (Graphene Flagship)
Europeiska kommissionen (EU) (EC/H2020/881603), 2020-04-01 -- 2023-03-31.
Spinntronik med topologiskt kvantmaterial och magnetisk heterostruktur
Vetenskapsrådet (VR) (2021-04821), 2022-01-01 -- 2025-12-31.
2D material-baserad teknologi för industriella applikationer (2D-TECH)
VINNOVA (2019-00068), 2020-05-01 -- 2024-12-31.
GKN Aerospace Sweden (2D-tech), 2021-01-01 -- 2024-12-31.
Tvådimensionell spintronik minnesteknik
Vetenskapsrådet (VR) (2021-05925), 2021-12-01 -- 2024-11-30.
Ämneskategorier
Annan fysik
Annan materialteknik
Den kondenserade materiens fysik
DOI
10.1002/adma.202209113
PubMed
36641649