Kinetic depinning of a magnetic domain wall above the Walker field

E. R. Lewis, D. Petit, L. O'Brien, A.-V. Jausovec, H. T. Zeng, D. E. Read, R. P. Cowburn
2011 Applied Physics Letters  
Domain wall propagation in micrometric wires: Limits of single domain wall regime J. Appl. Phys. 111, 07E311 (2012) Magnetic structure and resonance properties of a hexagonal lattice of antidots Low Temp. Phys. 38, 157 (2012) Thermally activated domain wall dynamics in a disordered magnetic nanostrip J. Appl. Phys. 109, 07D345 (2011) Noise investigation of the orthogonal fluxgate employing alternating direct current bias J. Appl. Phys. 109, 07E529 (2011) Comparison of electrical techniques for
more » ... cal techniques for magnetization dynamics measurements in micro/nanoscale structures The dynamical interaction between a transverse domain wall and a T-shaped trap is investigated, for domain wall motion in the oscillatory regime above the Walker field. We demonstrate experimentally the existence of distinct static and kinetic depinning fields in this regime, and show that the oscillatory motion of the domain wall leads to a distribution of kinetic depinning fields. Micromagnetic simulations are in good qualitative agreement with our experimental results.
doi:10.1063/1.3543844 fatcat:jcfznywr6bfxdbloji2sr64cla