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Permalloy-based carbon nanotube spin-valve

Aurich, H. and Baumgartner, A. and Freitag, F. and Eichler, A. and Trbovic, J. and Schonenberger, C.. (2010) Permalloy-based carbon nanotube spin-valve. Applied physics letters, Vol. 97 , 153116.

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Official URL: http://edoc.unibas.ch/dok/A6070311

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Abstract

In this paper we demonstrate that permalloy (Py), a widely used Ni/Fe alloy, forms contacts to carbon nanotubes (CNTs) that meet the requirements for the injection and detection of spin-polarized currents in carbon-based spintronic devices. We establish the material quality and magnetization properties of Py strips in the shape of suitable electrical contacts and find a sharp magnetization switching tunable by geometry in the anisotropic magnetoresistance (AMR) of a single strip at cryogenic temperatures. In addition, we show that Py contacts couple strongly to CNTs, comparable to Pd contacts, thereby forming CNT quantum dots at low temperatures. These results form the basis for a Py-based CNT spin-valve exhibiting very sharp resistance switchings in the tunneling magnetoresistance, which directly correspond to the magnetization reversals in the individual contacts observed in AMR experiments. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3502600]
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentalphysik Nanoelektronik (Schönenberger)
UniBasel Contributors:Schönenberger, Christian and Aurich, Hagen and Baumgartner, Andreas and Freitag, Frank and Eichler, Alexander and Trbovic, Jelena
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Institute of Physics
ISSN:0003-6951
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:01 Feb 2013 08:46
Deposited On:01 Feb 2013 08:44

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