Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session M55: Dynamics of Topological Spin Textures
8:00 AM–10:36 AM,
Wednesday, March 8, 2023
Room: Room 305
Sponsoring
Unit:
GMAG
Chair: Timothy Charlton, Oak Ridge National Lab
Abstract: M55.00010 : Skyrmion lattice formation and destruction mechanisms probed with SANS*
10:12 AM–10:24 AM
Presenter:
Namila C Liyanage
(University of Tennessee)
Authors:
Namila C Liyanage
(University of Tennessee)
Nan Tang
(University of Tennessee)
Lizabeth J Quigley
(University of Tennessee)
Guo-Jiun Shu
(Department of Materials and Mineral Resources Engineering)
Fang-Cheng Chou
(Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan)
Nicholas P Butch
(National Institute of Standards and Tech)
Markus Bleuel
(NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, USA)
Julie A Borchers
(National Institute of Standards and Technology)
Lisa M DeBeer-Schmitt
(ORNL)
Dustin A Gilbert
(University of Tennessee: Knoxville)
The formation and destruction time scales of skyrmions are important when it comes to applications. Typically, magnetic dynamics occur in the nanosecond (10-9 s) timeframe, however, the time scale of skyrmion formation may be much longer.
In this work, we have measured the slow dynamics on B20 skyrmion materials MnSi, FeCoSi, and Bloch skyrmions Cu2OSeO3, by using a magnetic field with a frequency of 0.1 Hz and measured with SANS. The formation rate of skyrmions was a surprisingly slow 10's of ms.
Skyrmions are been pushed back and forth in the skyrmion-stabilized window. By analyzing the scattering pattern with a 10 ms interval, the time constant for the skyrmions destroyed or created was observed between 27-40 ms while keeping the sample environment constant. Skyrmions follow their formation paths despite changing rates in the magnetic field.
1. Desautels, R.D., et al., Physical Review Materials, 2019. 3(10).
*This work was supported by U.S. DOE, Office of Science. Award DE-SC0021344
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