Fast Moving Multiple Magnetic Bits in Permalloy Cylindrical Nanowires

Controlling the movement of domain walls in magnetic nanowires is important due to the impact on the viability of data storage devices. A series of micromagnetic simulations of multiple current-induced domain walls motion (CIDWM) have been performed. Multiple CIDWM in the cylindrical permalloy nanowires display outstanding dynamic properties. In cases of different domain bits, we observed the motion of transverse domain walls (TDWs) did not show oscillatory behavior. The domain walls only changed their positions in the same direction as they propagated and kept the distance between the walls almost the same, with their internal magnetic structure unchanged. Furthermore, we have found that the TDW velocity in cylindrical thin wires was closely related to the wire thickness and showed a strong dependence on the Gilbert damping factor.

[1]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[2]  Andrew G. Glen,et al.  APPL , 2001 .

[3]  Gang Xiong,et al.  Submicrometer Ferromagnetic NOT Gate and Shift Register , 2002, Science.

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

[5]  S. Zhang,et al.  Roles of nonequilibrium conduction electrons on the magnetization dynamics of ferromagnets. , 2004, Physical review letters.

[6]  J A C Bland,et al.  Direct observation of domain-wall configurations transformed by spin currents. , 2005, Physical review letters.

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

[8]  A Imre,et al.  Majority Logic Gate for Magnetic Quantum-Dot Cellular Automata , 2006, Science.

[9]  Mathias Kläui,et al.  Current-induced vortex nucleation and annihilation in vortex domain walls , 2006 .

[10]  J. Ferré,et al.  Domain wall mobility, stability and Walker breakdown in magnetic nanowires , 2007, cond-mat/0702492.

[11]  Russell P. Cowburn,et al.  Applied physics: Champing at the bit , 2007, Nature.

[12]  U. Nowak,et al.  Numerical investigation of spin-torque using the Heisenberg model , 2007 .

[13]  C. Rettner,et al.  Current-Controlled Magnetic Domain-Wall Nanowire Shift Register , 2008, Science.

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

[15]  Shunsuke Fukami,et al.  Control of Multiple Magnetic Domain Walls by Current in a Co/Ni Nano-Wire , 2010 .

[16]  R. Hertel,et al.  Beating the walker limit with massless domain walls in cylindrical nanowires. , 2010, Physical review letters.

[17]  R. Wiesendanger,et al.  Current-driven domain wall motion in cylindrical nanowires , 2010 .

[18]  H. Fangohr,et al.  Enhanced spin transfer torque effect for transverse domain walls in cylindrical nanowires , 2011, 1104.3010.

[19]  J. Berakdar,et al.  Spin Density Waves and Domain Wall Interactions in Nanowires , 2011, 1104.5175.

[20]  J. Sirker,et al.  Electron scattering from domain walls in ferromagnetic Luttinger liquids , 2011, 1102.5446.

[21]  Shunsuke Fukami,et al.  Temperature dependence of carrier spin polarization determined from current-induced domain wall motion in a Co/Ni nanowire , 2012 .

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

[23]  Olga Smirnova,et al.  Nature in London , 2016 .