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나노 구조 물리 연구단
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Protecting nickel with graphene spin-filtering membranes: A single layer is enough

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Title
Protecting nickel with graphene spin-filtering membranes: A single layer is enough
Author(s)
Martin M.-B.; Dlubak B.; Weatherup R.S.; Piquemal-Banci M.; Heejun Yang; Blume R.; Schloegl R.; Collin S.; Petroff F.; Hofmann S.; Robertson J.; Anane A.; Fert A.; Seneor P.
Publication Date
2015-07
Journal
APPLIED PHYSICS LETTERS, v.107, no.1, pp.012408 -
Publisher
AMER INST PHYSICS
Abstract
We report on the demonstration of ferromagnetic spin injectors for spintronics which are protected against oxidation through passivation by a single layer of graphene. The graphene monolayer is directly grown by catalytic chemical vapor deposition on pre-patterned nickel electrodes. X-ray photoelectron spectroscopy reveals that even with its monoatomic thickness, monolayer graphene still efficiently protects spin sources against oxidation in ambient air. The resulting single layer passivated electrodes are integrated into spin valves and demonstrated to act as spin polarizers. Strikingly, the atom-thick graphene layer is shown to be sufficient to induce a characteristic spin filtering effect evidenced through the sign reversal of the measured magnetoresistance. © 2015 Author(s)
URI
http://pr.ibs.re.kr/handle/8788114/1978
DOI
10.1063/1.4923401
ISSN
0003-6951
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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