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Ballistic rectification of vortex domain wall chirality at nanowire corners
- Ballistic rectification of vortex domain wall chirality at nanowire corners
- Omari, K[Omari, K.]; Bradley, RC[Bradley, R. C.]; Broomhall, TJ[Broomhall, T. J.]; Hodges, MPP[Hodges, M. P. P.]; Rosamond, MC[Rosamond, M. C.]; Linfield, EH[Linfield, E. H.]; Im, MY[Im, M. -Y.]; Fischer, P[Fischer, P.]; Hayward, TJ[Hayward, T. J.]
- DGIST Authors
- Im, MY[Im, M. -Y.]
- Issue Date
- Applied Physics Letters, 107(22)
- Article Type
- Applied Magnetic Fields; Artificial Defects; Chirality; Domain Propagation; Domain Walls; Magnetic Domains; Magnetic Nanowires; Magnetism; Magneto-Optic Kerr Effect Measurements; Nanowires; Sensor Technologies; Soft X-Ray Transmission Microscopy; Vortex Domain Wall; Vortex Flow
- The interactions of vortex domain walls with corners in planar magnetic nanowires are probed using magnetic soft X-ray transmission microscopy. We show that when the domain walls are propagated into sharp corners using applied magnetic fields above a critical value, their chiralities are rectified to either clockwise or anticlockwise circulation depending on whether the corners turn left or right. Single-shot focused magneto-optic Kerr effect measurements are then used to demonstrate how, when combined with modes of domain propagation that conserve vortex chirality, this allows us to dramatically reduce the stochasticity of domain pinning at artificial defect sites. Our results provide a tool for controlling domain wall chirality and pinning behavior both in further experimental studies and in future domain wall-based memory, logic and sensor technologies. © 2015 AIP Publishing LLC.
- American Institute of Physics Publishing
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