Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session M40: Magnetization Dynamics in Novel Materials
11:30 AM–2:30 PM,
Wednesday, March 17, 2021
Sponsoring
Unit:
GMAG
Chair: Gen Yin, University of California, Los Angeles
Abstract: M40.00011 : Skyrmion lattice formation and destruction mechanisms probed with SANS*
2:18 PM–2:30 PM
On Demand
Presenter:
Namila Liyanage
(University of Tennessee)
Authors:
Namila Liyanage
(University of Tennessee)
Nan Tang
(University of Tennessee)
Lizabeth Quigley
(University of Tennessee)
Guo-Jiun Shu
(National Taiwan University/Institute of Mineral Resources Engineering)
Fangchang Chou
(National Taiwan University)
Nicholas Butch
(NIST/University of Maryland)
Markus Bleuel
(NIST)
Julie Borchers
(NIST)
Lisa DeBeer-Schmitt
(Oak Ridge National Laboratory)
Dustin Gilbert
(University of Tennessee)
The formation and destruction time scales of skyrmions are important when it comes to applications. Typically, magnetic dynamics occur on 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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