Tradeoff between low-power operation and thermal stability in magnetic domain-wall-motion devices driven by spin Hall torque

We investigate the wire-width dependence of the critical current density for the motion of a magnetic domain wall (DW) in asymmetric Co/Ni nanowires, where spin Hall torque dominates the current-induced DW motion. It is found that both the critical current density for DW motion and the pinning field of a DW increase as the wire width decreases and that the critical current density for DW motion is proportional to the pinning field of the DW; this finding suggests a tradeoff between low-power operation and thermal stability in magnetic domain-wall-motion devices driven by spin Hall torque.

[1]  S. Parkin,et al.  Chiral spin torque at magnetic domain walls. , 2013, Nature nanotechnology.

[2]  A. Yamaguchi,et al.  Erratum: Real-Space Observation of Current-Driven Domain Wall Motion in Submicron Magnetic Wires [Phys. Rev. Lett. 92, 077205 (2004)] , 2006 .

[3]  G. Beach,et al.  Current-driven dynamics of chiral ferromagnetic domain walls. , 2013, Nature materials.

[4]  W Wernsdorfer,et al.  Controlled and reproducible domain wall displacement by current pulses injected into ferromagnetic ring structures. , 2005, Physical review letters.

[5]  S. Fukami,et al.  Observation of the intrinsic pinning of a magnetic domain wall in a ferromagnetic nanowire. , 2011, Nature materials.

[6]  G. Tatara,et al.  Theory of current-driven domain wall motion: spin transfer versus momentum transfer. , 2004, Physical review letters.

[7]  S. Fukami,et al.  Current-induced magnetic domain wall motion below intrinsic threshold triggered by Walker breakdown. , 2012, Nature nanotechnology.

[8]  L. You,et al.  Spin Hall effect clocking of nanomagnetic logic without a magnetic field. , 2014, Nature nanotechnology.

[9]  Stephan Menzel,et al.  Memory Devices: Energy–Space–Time Tradeoffs , 2010, Proceedings of the IEEE.

[10]  D Petit,et al.  Magnetic Domain-Wall Logic , 2005, Science.

[11]  S. Nasu,et al.  Real-space observation of current-driven domain wall motion in submicron magnetic wires. , 2003, Physical review letters.

[12]  Hideo Ohno,et al.  Current-Induced Domain Wall Motion in Perpendicularly Magnetized Co/Ni Nanowire under In-Plane Magnetic Fields , 2012 .

[13]  S. Fukami,et al.  Magnetic field insensitivity of magnetic domain wall velocity induced by electrical current in Co/Ni nanowire , 2011 .

[14]  G. Tatara,et al.  A brief review of field- and current-driven domain-wall motion , 2011 .

[15]  S. Parkin,et al.  Magnetic Domain-Wall Racetrack Memory , 2008, Science.

[16]  S. Choe,et al.  Analytic theory of wall configuration and depinning mechanism in magnetic nanostructure with perpendicular magnetic anisotropy , 2009 .

[17]  D. Ralph,et al.  Spin-Torque Switching with the Giant Spin Hall Effect of Tantalum , 2012, Science.

[18]  C. Rettner,et al.  Influence of current on field-driven domain wall motion in permalloy nanowires from time resolved measurements of anisotropic magnetoresistance. , 2006, Physical review letters.

[19]  G. Beach,et al.  Nonlinear domain-wall velocity enhancement by spin-polarized electric current. , 2006, Physical review letters.

[20]  A. Fert,et al.  Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films , 2012, 1211.5970.

[21]  D. Ralph,et al.  Current-induced switching of perpendicularly magnetized magnetic layers using spin torque from the spin Hall effect. , 2012, Physical review letters.

[22]  Y. Nakatani,et al.  Threshold Current of Domain Wall Motion under Extrinsic Pinning, β-Term and Non-Adiabaticity(Condensed matter: electronic structure and electrical, magnetic, and optical properties) , 2006 .

[23]  Hideo Ohno,et al.  Two-barrier stability that allows low-power operation in current-induced domain-wall motion , 2013, Nature Communications.

[24]  J. H. Franken,et al.  Domain wall depinning governed by the spin Hall effect. , 2012, Nature materials.

[25]  Petr Nemec,et al.  Spin Hall Effect Transistor , 2010, Science.