Evidence of spontaneous spin polarized transport in magnetic nanowires

Abstract

The exploitation of the spin in charge-based systems is opening revolutionary opportunities for device architecture. Surprisingly, room temperature electrical transport through magnetic nanowires is still an unresolved issue. Here, we show that ferromagnetic (Co) suspended atom chains spontaneously display an electron transport of half a conductance quantum, as expected for a fully polarized conduction channel. Similar behavior has been observed for Pd (a quasi-magnetic 4d metal) and Pt (a non-magnetic 5d metal). These results suggest that the nanowire low dimensionality reinforces or induces magnetic behavior, lifting off spin degeneracy even at room temperature and zero external magnetic field.

4 pages, 3 eps figs

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• Quantum properties of atomic-sized conductors
• Formation and manipulation of a metallic wire of single gold atoms
• Possible Spin Polarization in a One-Dimensional Electron Gas
• Structure and Magnetism of Neutral and Anionic Palladium Clusters
• Quantum Conductance in Silver Nanowires: correlation between atomic structure and transport properties
• The role of structural evolution on the quantum conductance behavior of gold nanowires during stretching

Cited by in corpus (43)

• Ballistic conductance of magnetic Co and Ni nanowires with ultrasoft pseudo-potentials
• Magnetism in Atomic-Sized Palladium Contacts and Nanowires
• Absence of magnetically-induced fractional quantization in atomic contacts
• Systematic {\it ab initio} study of the magnetic and electronic properties of all 3d transition metal linear and zigzag nanowires
• Theoretical analysis of the conductance histograms and structural properties of Ag, Pt and Ni nanocontacts
• Anomalous Conductance Quantization in Carbon Nanotubes
• Theoretical study of the conductance of ferromagnetic atomic-sized contacts
• Single channel conductance of H${}_2$ molecules attached to platinum or palladium electrodes
• Transport in magnetically ordered Pt nanocontacts
• Quantized Conductance of a Single Magnetic Atom
• Ballistic Conductance and Magnetism in Short Tip-Suspended Ni Nanowires
• Half-metallic properties of atomic chains of carbon-transition metal compounds
• Fast Switching of Bistable Magnetic Nanowires Through Collective Spin Reversal
• Emerging nanomagnetism in 4d transition metal nanowires
• Predictions for the formation of new atomic chains in Mechanically Controllable Break Junction experiments
• Magnetic moment and magnetic anisotropy of linear and zigzag 4{\it d} and 5{\it d} transition metal nanowires: First-principles calculations
• {\it Ab initio} studies of spin-spiral waves and exchange interactions in 3{\it d} transition metal atomic chains
• Effect of electron correlations in Pd, Ni, and Co monowires
• The nature of the electrical conduction in ferromagnetic atomic-size contacts: insights from shot noise measurements and theoretical simulations
• On the Formation of Copper Linear Atomic Suspended Chains
• Electron transport in a Pt-CO-Pt nanocontact: First-principles calculations
• Statistical analysis of Ni nanowires breaking processes: a numerical simulation study
• Conduction eigenchannels of atomic-sized contacts: Ab initio KKR Green's function formalism
• Magnetic Moment Softening and Domain Wall Resistance in Ni Nanowires
• Magnetically hindered chain formation in transition-metal break junctions
• Interaction of a CO molecule with a Pt monatomic wire: electronic structure and ballistic conductance
• Topological quantum phase transition between Fermi liquid phases in an Anderson impurity model
• Giant orbital moments are responsible for the anisotropic magnetoresistance of atomic contacts
• Half-metallic Ferrimagnetism Driven by Coulomb Enhanced Spin-Orbit Coupling in PdCrO3
• Fingerprints of the Magnetic Polaron in Nonequilibrium Electron Transport through a Quantum Wire Coupled to a Ferromagnetic Spin Chain
• Kondo behavior and conductance through $3d$ impurities in gold chains doped with oxygen
• Flux driven and geometry controlled spin filtering for arbitrary spins in aperiodic quantum networks
• Spin filter for arbitrary spins by substrate engineering
• Coulomb interaction effects and electron spin relaxation in the 1d Kondo lattice model
• Tailoring magnetoresistance through rotating Ni particles
• Strong paramagnon scattering in single atom Pd contacts
• Spin filtering and switching action in a diamond network with magnetic-nonmagnetic atomic distribution
• Electronic structure and transport for a laser-field-irradiated quantum wire with Rashba spin-orbit coupling
• Ballistic conductance of Ni nanowire with a magnetization reversal
• Conductance of Ferro- and Antiferro-magnetic single-atom contacts: A first-principles study
• Conductance of single-atom magnetic junctions: A first-principles study
• Correlation between Quantum Conductance and Atomic Arrangement of Silver Atomic-Size Nanowires
• Scanning Tunneling Microscopy in high vectorial magnetic fields