Oblique spin injection to graphene via geometry controlled magnetic nanowires

We exploit the geometry of magnetic nanowires, which define 1D contacts to an encapsulated graphene channel, to introduce an out-of-plane component in the polarisation of spin carriers. By design, the magnetic nanowires traverse the angled sides of the 2D material heterostructure. Consequently, the...

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Bibliographic Details
Published in:Npj spintronics Vol. 2; no. 1; pp. 38 - 6
Main Authors: Toscano-Figueroa, Jesus C., Burrow, Daniel, Guarochico-Moreira, Victor H., Xie, Chengkun, Thomson, Thomas, Grigorieva, Irina V., Vera-Marun, Ivan J.
Format: Journal Article
Language:English
Published: London Nature Publishing Group UK 01.12.2024
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Subjects:
639/766/119/1001
639/766/119/2793
639/925/918/1052
Angles (geometry)
Anisotropy
Electrodes
Electrons
Geometry
Graphene
Heterostructures
Linear polarization
Magnetic fields
Magnetic Materials
Magnetic measurement
Magnetic wire
Magnetism
Nanowires
Physics
Physics and Astronomy
Polarization (spin alignment)
Quantum Information Technology
Sensors
Spin valves
Spintronics
Two dimensional materials
ISSN:2948-2119, 2948-2119
Online Access:Get full text
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Summary:We exploit the geometry of magnetic nanowires, which define 1D contacts to an encapsulated graphene channel, to introduce an out-of-plane component in the polarisation of spin carriers. By design, the magnetic nanowires traverse the angled sides of the 2D material heterostructure. Consequently, the easy axis of the nanowires is inclined, and so the local magnetisation is oblique at the injection point. As a result, when performing non-local spin valve measurements we simultaneously observe both switching and spin precession phenomena, implying the spin population possesses both in-plane and out-of-plane polarisation components. By comparing the relative magnitudes of these components, we quantify the angle of the total spin polarisation vector. The extracted angle is consistent with the angle of the nanowire at the graphene interface, evidencing that the effect is a consequence of the device geometry. This simple method of spin-based vector magnetometry provides an alternative technique to define the spin polarisation in 2D spintronic devices.
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ISSN:2948-2119
2948-2119
DOI:10.1038/s44306-024-00043-2