TY - GEN
T1 - Reconstruction and electronic properties of interface between carbon nanotubes and ferromagnetic Co electrodes
AU - Cuong, Nguyen Tien
AU - Mohamed, Mohd Ambri
AU - Otsuka, Nobuo
AU - Chi, Dam Hieu
PY - 2012
Y1 - 2012
N2 - The reconstruction and electronic structures of the interfaces between single wall carbon nano tubes 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 nano tubes 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 nano tube 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 nano tube. It implies that the spin transport through this layer is low, which results in the small hysteretic magneto-resistance of carbon nano tube devices.
AB - The reconstruction and electronic structures of the interfaces between single wall carbon nano tubes 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 nano tubes 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 nano tube 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 nano tube. It implies that the spin transport through this layer is low, which results in the small hysteretic magneto-resistance of carbon nano tube devices.
KW - Carbon nanotubes
KW - Cnts
KW - Co electrodes
KW - Ferromagnetic electrodes
KW - Fisrt-principle calculatons
KW - Reconstruction of interface between cnts and ferromagnetic electrodes
UR - http://www.scopus.com/inward/record.url?scp=84871374839&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84871374839&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMM.229-231.183
DO - 10.4028/www.scientific.net/AMM.229-231.183
M3 - Conference contribution
AN - SCOPUS:84871374839
SN - 9783037855102
T3 - Applied Mechanics and Materials
SP - 183
EP - 187
BT - Mechanical and Electrical Technology IV
T2 - 4th International Conference on Mechanical and Electrical Technology, ICMET 2012
Y2 - 24 July 2012 through 26 July 2012
ER -