Abstract
We report on the fabrication and characterization of magnetic tunnel junctions consisting of a single layer of graphene as the tunnel barrier, sandwiched between two metallic ferromagnetic electrodes. We employ a fabrication process chosen to minimize oxidation of the electrode materials at the ferromagnet/graphene interfaces. The devices have low resistance-area products of 1.5–6 Ω μm, with low-temperature magnetoresistances of 1.5–3.4%. The temperature and bias dependencies of the resistance confirm that transport is dominated by tunneling processes rather than by any unintended pinholes.
- Received 30 December 2013
- Revised 14 February 2014
DOI:https://doi.org/10.1103/PhysRevB.89.184418
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