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Updated: Mar 18, 2026

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
Spin diffusion and non-local spin-valve effect in an exfoliated multilayer graphene with a Co electrode
Lijun Li1, Inyeal Lee, Dongsuk Lim
1School of Electronic and Electrical Engineering and Sungkyunkwan University Advanced Institute of Nanotechnology, Sungkyunkwan University, Suwon 16419, Korea.
Abstract:
We fabricated a non-local spin valve with a thin layer of graphite with Co transparent electrodes. The spin-valve effect and spin precession were observed at room temperature. The magnitude of the mangetoresistance increases when temperature decreases. The spin-relaxation time, [Formula: see text], obtained from the fitting of the Hanle curves increases with decreasing temperature with a weak dependence [Formula: see text] while the spin-diffusion constant D decreases. At room temperature, [Formula: see text] exceeds 100 ps and the spin-diffusion length, [Formula: see text], is ∼2 μm. The temperature dependence of [Formula: see text] is not monotonic, and it has the largest value at room temperature. Our results show that multilayer graphene is a suitable material for spintronic devices.
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