Current Induced Excitations in Cu/Co/Cu Single Ferromagnetic Layer Nanopillars

Abstract

Current-induced magnetic excitations in Cu/Co/Cu single layer nanopillars (~50 nm in diameter) have been studied experimentally as a function of Co layer thickness at low temperatures for large applied fields perpendicular to the layers. For asymmetric junctions current induced excitations are observed at high current densities for only one polarity of the current and are absent at the same current densities in symmetric junctions. These observations confirm recent predictions of spin-transfer torque induced spin wave excitations in single layer junctions with a strong asymmetry in the spin accumulation in the leads.

4 pages, 3 figures, submitted to Phys. Rev. Lett

References in corpus (7)

• Microwave Oscillations of a Nanomagnet Driven by a Spin-Polarized Current
• Current-driven Magnetization Reversal and Spin Wave Excitations in Co/Cu/Co Pillars
• Direct-Current Induced Dynamics in Co90Fe10/Ni80Fe20 Point Contacts
• Current-Induced Magnetization Reversal in High Magnetic Fields in Co/Cu/Co Nanopillars
• Current-induced spin-wave excitations in a single ferromagnetic layer
• Theory of Current-Induced Magnetization Precession
• Current-induced transverse spin wave instability in a thin nanomagnet

Cited by in corpus (34)

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• Model for a collimated spin wave beam generated by a single layer, spin torque nanocontact
• Experimental Test of Analytic Theory of Spin Torque Oscillator Dynamics
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• Thermally-Assisted Spin-Transfer Torque Dynamics in Energy Space
• Self-consistent calculation of spin transport and magnetization dynamics
• Sub-ns spin-transfer switching: compared benefits of free layer biasing and pinned layer biasing
• Auto-oscillation threshold, narrow spectral lines, and line jitter in spin-torque oscillators based on MgO magnetic tunnel junctions
• Effects of spin current on ferromagnets
• Current-induced macrospin vs spin-wave excitations in spin valves
• Bipolar High Field Excitations in Co/Cu/Co Nanopillars
• Current-induced switching in single ferromagnetic layer nanopillar junctions
• Spin-transfer in bilayer magnetic nanopillars at high fields as a function of free layer thickness
• Spectroscopy of phonons and spin torques in magnetic point contacts
• Spin-Transfer Torque Magnetization Reversal in Uniaxial Nanomagnets with Thermal Noise
• Surface Spin-valve Effect
• Current induced transverse spin-wave instability in thin ferromagnets: beyond linear stability analysis
• Spin dynamics in point contacts to single ferromagnetic films
• New pathways towards efficient metallic spin Hall spintronics
• Current-induced spin polarization in isotropic k-cubed Rashba model: Theoretical study for p-doped semiconductor heterostructures and perovskite oxides interfaces
• All-Optical Generation and Tuning of Ultrafast Spin-Hall Current via Optical Vortices
• Effective attraction induced by repulsive interaction in a spin-transfer system
• Nanofabrication of spin-transfer torque devices by a PMMA mask one step process: GMR versus single layer devices
• Focused-ion-beam milling based nanostencil mask fabrication for spin transfer torque studies
• Current-induced magnetization reversal in SrRuO3
• AC- and DC-driven noise and I-V characteristics of magnetic nanostructures
• Current-induced magnetization dynamics in single and double layer magnetic nanopillars grown by molecular beam epitaxy
• Spin Torques in Point Contacts to Exchange-Biased Ferromagnetic Films
• Spin-transfer-induced excitations in bilayer magnetic nanopillars at high fields: The effects of contact layers
• Nonequilibrium interacting electrons in a ferromagnet
• Neuromorphic computing with nanoscale spintronic oscillators