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A Room-Temperature Spin-Valve with van der Waals Ferromagnet Fe5GeTe2/Graphene Heterostructure

Zhao, Bing ; Ngaloy, Roselle ; Ghosh, Sukanya ; Ershadrad, Soheil ; Gupta, Rahul ; Ali, Khadiza LU ; Hoque, Anamul Md ; Karpiak, Bogdan ; Khokhriakov, Dmitrii and Polley, Craig LU , et al. (2023) In Advanced Materials 35(16).
Abstract

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... (More)

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.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
2D magnets, Fe GeTe, graphene, Hanle spin precession, spin-valve, van der Waals heterostructures, van der Waals magnets
in
Advanced Materials
volume
35
issue
16
article number
2209113
publisher
John Wiley & Sons Inc.
external identifiers
  • pmid:36641649
  • scopus:85148414102
ISSN
0935-9648
DOI
10.1002/adma.202209113
language
English
LU publication?
yes
id
809b92bb-3cde-4487-aee5-6dee641c9f92
date added to LUP
2024-01-12 13:19:31
date last changed
2024-04-27 09:55:56
@article{809b92bb-3cde-4487-aee5-6dee641c9f92,
  abstract     = {{<p>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 Fe<sub>5</sub>GeTe<sub>2</sub> in heterostructures with graphene is demonstrated. The room-temperature spintronic properties of Fe<sub>5</sub>GeTe<sub>2</sub> 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 Fe<sub>5</sub>GeTe<sub>2</sub>/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 Fe<sub>5</sub>GeTe<sub>2</sub> along with the presence of negative spin polarization at the Fe<sub>5</sub>GeTe<sub>2</sub>/graphene interface. These findings open opportunities for vdW interface design and applications of vdW-magnet-based spintronic devices at ambient temperatures.</p>}},
  author       = {{Zhao, Bing and Ngaloy, Roselle and Ghosh, Sukanya and Ershadrad, Soheil and Gupta, Rahul and Ali, Khadiza and Hoque, Anamul Md and Karpiak, Bogdan and Khokhriakov, Dmitrii and Polley, Craig and Thiagarajan, Balasubramanian and Kalaboukhov, Alexei and Svedlindh, Peter and Sanyal, Biplab and Dash, Saroj P.}},
  issn         = {{0935-9648}},
  keywords     = {{2D magnets; Fe GeTe; graphene; Hanle spin precession; spin-valve; van der Waals heterostructures; van der Waals magnets}},
  language     = {{eng}},
  month        = {{04}},
  number       = {{16}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{Advanced Materials}},
  title        = {{A Room-Temperature Spin-Valve with van der Waals Ferromagnet Fe<sub>5</sub>GeTe<sub>2</sub>/Graphene Heterostructure}},
  url          = {{http://dx.doi.org/10.1002/adma.202209113}},
  doi          = {{10.1002/adma.202209113}},
  volume       = {{35}},
  year         = {{2023}},
}