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Reconstruction and electronic properties of interface between carbon nanotubes and ferromagnetic co electrodes

Cuong, Nguyen Tien and Mohamed, Mohd Ambri and Otsuka, Nobuo and Chi, Dam Hieu (2012) Reconstruction and electronic properties of interface between carbon nanotubes and ferromagnetic co electrodes. Applied Mechanics and Materials, 229-31. pp. 183-187. ISSN 1660-9336

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Abstract

The reconstruction and electronic structures of the interfaces between single wall carbon nanotubes and ferromagnetic Co electrodes were studied in the framework of density functional theory. The obtained results revealed that there is a strong interaction between carbon nanotubes and Co electrodes. At the interface region, Top layers of Co surface have been significantly reconstructed. The nature of chemical bonds at the Co-C interface is covalent bonding. The increase of the electron density occurs mainly at the interface where a substantial concentration of electron accumulates in Co-C bonds. A small amount of charge transfer from Co electrode to carbon nanotube junction was found. In addition, the spin polarization of Co atoms at the interface region has been suppressed due to the interaction with a carbon nanotube. It implies that the spin transport through this layer is low, which results in the small hysteretic magneto-resistance of carbon nanotube devices.

Item Type: Article (Journal)
Additional Information: 6933/29880
Uncontrolled Keywords: carbon nanotubes, CNTs, Ferromagnetic electrodes, Co electrodes, Fisrt-principle calculatons, Reconstruction of interface between CNTs and ferromagnetic electrodes
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ163.26 Energy conservation
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User: Dr Mohd Ambri Mohamed
Date Deposited: 14 Jun 2013 09:33
Last Modified: 17 Jul 2014 12:29
URI: http://irep.iium.edu.my/id/eprint/29880

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