Controlled normal and inverse magnetoresistance and current-driven magnetization switching in magnetic nanopillars

Abstract

Combining pairs of ferromagnetic metals with different signs of scattering anisotropies, let us independently invert the magnetoresistance and the direction of current-driven switching in ferromagnetic/non-magnetic/ferromagnetic metal nanopillars. We show all four combinations of normal and inverse behaviors, at both room temperature and 4.2K. In all cases studied, the direction of switching is set by the net scattering anisotropy of the fixed (polarizing) ferromagnet. We provide simple arguments for what we see.

4 pages, 5 figures, submitted to PRL

References in corpus (8)

• Spin pumping and magnetization dynamics in metallic multilayers
• Current-Driven Magnetic Excitations in Permalloy-Based Multilayer Nanopillars
• Field dependence of magnetization reversal by spin transfer
• Magnetization reversal by injection and transfer of spin: experiments and theory
• Effect of Antiferromagnetic Interlayer Coupling on Current-Assisted Magnetization Switching
• Current-Driven Magnetization Dynamics in Magnetic Multilayers
• Current-driven excitations in magnetic multilayers: a brief review
• Inverted current-driven switching in Fe(Cr)/Cr/Fe(Cr) nanopillars

Cited by in corpus (16)

• Time-Domain Studies of Very-Large-Angle Magnetization Dynamics Excited by Spin Transfer Torques
• Current-driven destabilization of both collinear configurations in asymmetric spin-valves
• Description of current-driven torques in magnetic tunnel junctions
• Manipulating Current-Induced Magnetization Switching
• Microwave excitations associated with a wavy angular dependence of the spin transfer torque : model and experiments
• Thermally Assisted Current-Driven Bistable Precessional Regimes in Asymmetric Spin Valves
• Analytic expression of the temperature increment in a spin transfer torque nanopillar structure
• Correlation of the angular dependence of spin-transfer torque and giant magnetoresistance in the limit of diffusive transport in spin valves
• Micromagnetic simulations of persistent oscillatory modes excited by spin-polarized current in nanoscale exchange-biased spin valves
• Spin-transfer switching and low-field precession in exchange-biased spin valve nano-pillars
• Magnetization reversal driven by spin-injection : a mesoscopic spin-transfer effect
• Spin-torque generation by dc or ac voltages in magnetic layered structures
• Sustained RF oscillations from thermally induced spin-transfer torque
• Enhancing atomic ordering, magnetic and transport properties of Mn2VGa Heusler alloy thin films toward negatively spin-polarized charge injection
• Effect of spin diffusion on spin torque in magnetic nanopillars
• Computational study of microwave oscillations in absence of external field in nonstandard spin valves in the diffusive transport limit