CoB/Ni-Based Multilayer Nanowire with High-Speed Domain Wall Motion under Low Current Control

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概要

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• The spin-transfer torque motion of magnetic domain walls (DWs) in a CoB/Ni-based nanowire driven by a low current density of (1.12\pm 0.8)\times 10^{11} A m-2 has been observed indirectly by magnetotransport measurements. A high DW velocity of 85\pm 4 m/s at zero field was measured at the threshold current density. Upon increasing the current density to 2.6\times 10^{11} A m-2, the DW velocity increases to 197\pm 16 m/s before decreasing quickly in the high-current-density regime attributed to nonadiabatic spin-transfer torque at a low damping factor and weak pinning. The addition of B atoms to the Co layers decreased the magnitude of saturation magnetization, Gilbert damping factor, and density of pinning sites, making the CoB/Ni multilayer nanowire favorable for practical applications.

• 2012-09-25

著者

• Ngo Duc-the

  Information Storage Materials Laboratory Toyota Technological Institute

• Awano Hiroyuki

  Information Storage Materials Laboratory, Toyota Technological Institute, Nagoya 468-8511, Japan

• Watanabe Norihito

  Information Storage Materials Laboratory, Toyota Technological Institute, Nagoya 468-8511, Japan

関連論文

• Direct Observation of Domain Wall Motion Induced by Low-Current Density in TbFeCo Wires
• CoB/Ni-Based Multilayer Nanowire with High-Speed Domain Wall Motion under Low Current Control
• Design of Spin Polarization Analyzer using Transverse-Longitudinal Correlation in Resistivities Induced by Spin--Orbit Interaction

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