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Role of hexagonal boron nitride in protecting ferromagnetic nanostructures from oxidation

Zihlmann, Simon and Makk, Peter and Vaz, Carlos A. F. and Schoenenberger, Christian. (2016) Role of hexagonal boron nitride in protecting ferromagnetic nanostructures from oxidation. 2D Materials, 3 (1). 011008.

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Official URL: http://edoc.unibas.ch/52347/

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Abstract

Ferromagnetic contacts are widely used to inject spin polarized currents into non-magnetic materials such as semiconductors or 2-dimensional materials like graphene. In these systems, oxidation of the ferromagnetic materials poses an intrinsic limitation on device performance. Here we investigate the role of ex situ transferred chemical vapour deposited hexagonal boron nitride (hBN) as an oxidation barrier for nanostructured cobalt and permalloy electrodes. The chemical state of the ferromagnets was investigated using x-ray photoemission electron microscopy because of its high sensitivity and lateral resolution. We have compared the oxide thickness formed on ferromagnetic nanostructures covered by hBN to uncovered reference structures. Our results show that hBN reduces the oxidation rate of ferromagnetic nanostructures suggesting that it could be used as an ultra-thin protection layer in future spintronic devices.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentalphysik Nanoelektronik (Schönenberger)
UniBasel Contributors:Schönenberger, Christian and Makk, Peter and Zihlmann, Simon
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:IOP Publishing
ISSN:2053-1583
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:15 Feb 2017 08:34
Deposited On:15 Feb 2017 08:34

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