Characteristics of domain wall chirality and propagation in a Y-junction nanowire

Chirality-dependent propagation of transverse wall along a nanowire was investigated using a Y-junction with spin-valve structure. It was found that the Y-junction can be used for convenient and effective electric detection of transverse domain wall chirality, especially in a nanowire with sub-200 nm width, where it is difficult to electrically detect chirality using conventional artificial defect, such as a notch, due to small resistance change. Domain wall propagation path in the Y-junction was found to be determined by the wall chirality, whether clockwise or counterclockwise. Using the Y-junction nanowire, characteristics of domain wall chirality that was nucleated in a nucleation pad, attached at the end of a nanowire, were studied and found to be in good agreement with the results of theoretical simulation.

[1]  W. Lew,et al.  Direct observation of domain wall evolution at a bifurcation in magnetic network structures , 2014 .

[2]  P. Fischer,et al.  Fast generation of domain walls with defined chirality in nanowires , 2014 .

[3]  C. Rettner,et al.  Domain wall trajectory determined by its fractional topological edge defects , 2013, Nature Physics.

[4]  T. Trypiniotis,et al.  Topological-charge-driven reversal of ferromagnetic rings via360∘domain-wall formation , 2013 .

[5]  L. F. Cohen,et al.  The non-random walk of chiral magnetic charge carriers in artificial spin ice , 2013, Scientific Reports.

[6]  Roland Mattheis,et al.  Concepts and steps for the realization of a new domain wall based giant magnetoresistance nanowire device: From the available 24 multiturn counter to a 212 turn counter , 2012 .

[7]  B. Cho,et al.  Field and current induced asymmetric domain wall motion in a giant magnetoresistance spin-valve stripe with a circular ring , 2012 .

[8]  Luc Thomas,et al.  Topological repulsion between domain walls in magnetic nanowires leading to the formation of bound states , 2012, Nature Communications.

[9]  M. A. Bashir,et al.  Remote domain wall chirality measurement via stray field detection , 2011 .

[10]  D. Lacour,et al.  Stochastic and complex depinning dynamics of magnetic domain walls , 2011 .

[11]  D. Eastwood,et al.  Chirality-dependent domain wall pinning in a multinotched planar nanowire and chirality preservation using transverse magnetic fields , 2011 .

[12]  D. Eastwood,et al.  Scaling Behaviour of Chirality Dependent Domain Wall Pinning in Planar Nanowires , 2010 .

[13]  L. Lagae,et al.  Suppression of complex domain wall behavior in Ni80Fe20 nanowires by oscillating magnetic fields , 2010 .

[14]  A. Kunz,et al.  Dependence of domain wall structure for low field injection into magnetic nanowires , 2009 .

[15]  T. Mikolajick,et al.  Experimental study of domain wall motion in long nanostrips under the influence of a transverse field , 2008 .

[16]  A. Kunz,et al.  Fast domain wall motion in nanostripes with out-of-plane fields , 2008, 0806.1205.

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

[18]  D. Allwood,et al.  Magnetic domain wall propagation in nanowires under transverse magnetic fields , 2008 .

[19]  D. Eastwood,et al.  Controlling domain wall pinning in planar nanowires by selecting domain wall type and its application in a memory concept , 2008 .

[20]  Y. Jang,et al.  Characteristics of domain wall pinning and depinning in a three-terminal magnetic Y-junction , 2008, Nanotechnology.

[21]  D. Lacour,et al.  Magnetic domain wall propagation in a submicron spin-valve stripe: Influence of the pinned layer , 2008, 0801.0781.

[22]  J. Chapman,et al.  Controlled domain wall injection into ferromagnetic nanowires from an optimized pad geometry , 2007 .

[23]  Luc Thomas,et al.  Dependence of current and field driven depinning of domain walls on their structure and chirality in permalloy nanowires. , 2006, Physical review letters.

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

[25]  G. Faini,et al.  Direct observation of domain-wall pinning at nanoscale constrictions , 2005 .

[26]  G. Chern,et al.  Fractional vortices and composite domain walls in flat nanomagnets. , 2005, Physical review letters.

[27]  Jacques Miltat,et al.  Head-to-head domain walls in soft nano-strips: a refined phase diagram , 2005 .

[28]  Jordan A. Katine,et al.  Experimental evidence of multiple stable locations for a domain wall trapped by a submicron notch , 2004 .