Europhys. Lett.
Volume 73, Number 4, February 2006
Page(s) 642 - 648
Section Interdisciplinary physics and related areas of science and technology
Published online 11 January 2006
Europhys. Lett., 73 (4), pp. 642-648 (2006)
DOI: 10.1209/epl/i2005-10432-4

Nanospintronic properties of carbon-cobalt atomic chains

E. 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)$_\infty$, 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.

© EDP Sciences 2006