Non-equilibrium chiral domain wall dynamics excited by transverse magnetic field pulses

Title
Non-equilibrium chiral domain wall dynamics excited by transverse magnetic field pulses
Authors
김경환Jaehun ChoMyoung-Jae LeeHyeon-Jun LeeJune Seo Kim
Keywords
domain wall motion; Dzyaloshinskii-Moriya interaction
Issue Date
2020-10
Publisher
Journal of physics, Condensed matter : an Institute of Physics journal
Citation
VOL 33-015803
Abstract
Non-equilibrium domain wall dynamics on a perpendicularly magnetized nanowire manipulated by the transverse magnetic field pulse are numerically investigated. We systematically observe the large displacements of the chiral domain wall and the domain wall tilting angles generated by Dzyaloshinskii– Moriya interaction during the competition between the precession torque and the magnetic damping process. The magnetic-property-dependent domain wall displacements exhibit that the lower magnetic damping constants and Dzyaloshinskii– Moriya energy densities generate the longer transition times and the significant larger domain wall displacements for the non-equilibrium magnetization dynamics. Compare with the spin-polarized-current-driven domain wall dynamics, the transverse magnetic field pulses guarantee faster domain wall movements without Walker breakdown and lower energy consumptions because it is free from the serious Joule heating issue. Finally, we demonstrate successive chiral domain wall displacements, which are necessary to develop multilevel resistive memristors for next-generation artificial intelligent devices based on magnetic domain wall motions.
URI
http://pubs.kist.re.kr/handle/201004/71937
ISSN
0953-8984
Appears in Collections:
KIST Publication > Article
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