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Graphene-passivated nickel as an oxidation-resistant electrode for spintronics.


Type

Article

Change log

Authors

Dlubak, Bruno 
Martin, Marie-Blandine 
Weatherup, Robert S 
Yang, Heejun 
Deranlot, Cyrile 

Abstract

We report on graphene-passivated ferromagnetic electrodes (GPFE) for spin devices. GPFE are shown to act as spin-polarized oxidation-resistant electrodes. The direct coating of nickel with few layer graphene through a readily scalable chemical vapor deposition (CVD) process allows the preservation of an unoxidized nickel surface upon air exposure. Fabrication and measurement of complete reference tunneling spin valve structures demonstrate that the GPFE is maintained as a spin polarizer and also that the presence of the graphene coating leads to a specific sign reversal of the magneto-resistance. Hence, this work highlights a novel oxidation-resistant spin source which further unlocks low cost wet chemistry processes for spintronics devices.

Description

Keywords

graphene, chemical vapor deposition, passivation, spintronics ferromagnet, magnetism

Journal Title

ACS Nano

Conference Name

Journal ISSN

1936-0851
1936-086X

Volume Title

6

Publisher

American Chemical Society (ACS)
Sponsorship
European Research Council (279342)
European Commission (285275)
R.S.W. acknowledges funding from EPSRC (Doctoral training award). S.H. acknowledges funding from ERC Grant InsituNANO (Project Reference 279342). P.S. acknowledges the Institut Universitaire de France for junior fellowship support. This research was partially supported by the EU FP7 work programme under Grant GRAFOL (Project Reference 285275).