Nanospintronic properties of carbon-cobalt atomic chainsE. Durgun1, R. T. Senger1, H. Mehrez2, S. Dag1 and S. Ciraci1
1 Department of Physics, Bilkent University - Bilkent, Ankara 06800, Turkey
2 Center for NanoTechnology, NASA Ames Research Center Moffett Field, CA 94035-1000, USA
received 8 November 2005; accepted 21 December 2005
published online 11 January 2006
Periodic atom chains of carbon-cobalt compounds, (CnCo), comprise both conducting and insulating electronic properties simultaneously depending on the spin type of electrons, and hence are half-metals. Their band gap and the net magnetic moment oscillate with the number of carbon atoms in a unit cell. Finite segments of these chains also show interesting magnetic and transport properties. When connected to appropriate metallic electrodes the antiferromagnetic CoCnCo segments behave like molecular spin-valves, which can be conveniently manipulated.
85.75.-d - Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields.
75.75.+a - Magnetic properties of nanostructures.
75.47.Jn - Ballistic magnetoresistance.
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