Long Spin Diffusion Length in Few-Layer Graphene Flakes

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2016-09-27
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Mcode
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Language
en
Pages
1-6
Series
Physical Review Letters, Volume 117, issue 14
Abstract
We report a spin valve with a few-layer graphene flake bridging highly spin-polarized La0.67Sr0.33MnO3 electrodes, whose surfaces are kept clean during lithographic definition. Sharp magnetic switching is verified using photoemission electron microscopy with x-ray magnetic circular dichroism contrast. A naturally occurring high interfacial resistance ∼12 MΩ facilitates spin injection, and a large resistive switching (0.8 MΩ at 10 K) implies a 70-130 μm spin diffusion length that exceeds previous values obtained with sharp-switching electrodes.
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Yan , W , Phillips , L C , Barbone , M , Hämäläinen , S J , Lombardo , A , Ghidini , M , Moya , X , MacCherozzi , F , Van Dijken , S , Dhesi , S S , Ferrari , A C & Mathur , N D 2016 , ' Long Spin Diffusion Length in Few-Layer Graphene Flakes ' , Physical Review Letters , vol. 117 , no. 14 , 147201 , pp. 1-6 . https://doi.org/10.1103/PhysRevLett.117.147201