Durgun, EnginSenger, R. T.Mehrez, H.Sevinçli, H.Çıracı, Salim2016-02-082016-02-0820060021-9606http://hdl.handle.net/11693/23697Spin-polarized electronic and transport properties of carbon atomic chains are investigated when they are capped with magnetic transition-metal (TM) atoms like Cr or Co. The magnetic ground state of the TM-C n-TM chains alternates between the ferromagnetic (F) and antiferromagnetic (AF) spin configurations as a function of n. In view of the nanoscale spintronic device applications the desirable AF state is obtained for only even-n chains with Cr; conversely only odd-n chains with Co have AF ground states. When connected to appropriate metallic electrodes these atomic chains display a strong spin-valve effect. Analysis of structural, electronic, and magnetic properties of these atomic chains, as well as the indirect exchange coupling of the TM atoms through non-magnetic carbon atoms are presented.EnglishAtomic chainsIndirect exchange couplingMetallic electrodesSpintronic devicesAntiferromagnetismElectronic propertiesFerromagnetismGround stateMagnetic couplingsMagnetoresistanceTransport propertiesCrystal atomic structureArticle10.1063/1.2354080