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Title: Control of a twisted domain wall motion supported by topology

Journal Article · · Journal of Applied Physics
DOI: https://doi.org/10.1063/5.0187965 · OSTI ID:2426890
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [1]
  1. Chonnam National Univ., Gwangju (Korea, Republic of)
  2. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Center for X-ray Optics; Korea National University of Transportation (Korea, Republic of)
  3. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Center for X-ray Optics

We report the topology-mediated modulation of a twisted domain wall speed in a thick perpendicularly magnetized system. By exploiting the topological robustness of the direction of the Bloch wall component in the twisted domain wall, we show that the domain wall speed either increases or decreases depending on whether the transverse magnetic field is parallel or antiparallel to the Bloch wall component. The decrease in the speed is maintained until the antiparallel transverse reaches ~0.3 T, indicating that the twisted domain wall can offer wide controllability supported by the topological robustness which involves an injection of a Bloch point. We also demonstrate that the transverse magnetic field suppresses the Walker breakdown, allowing high mobility domain wall motion for a wide range of perpendicular driving fields.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
2426890
Journal Information:
Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 10 Vol. 135; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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