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 T00: Poster Session III (1pm-4pm PST)
1:00 PM,
Thursday, March 9, 2023
Room: Exhibit Hall (Forum Ballroom)
Sponsoring
Unit:
APS
Abstract: T00.00204 : Visualization of spin-wave propagation dynamics using laser-free GHz stroboscopic transmission electron microscopy*
Presenter:
Chuhang Liu
(Stony Brook University (SUNY))
Authors:
Chuhang Liu
(Stony Brook University (SUNY))
Spencer A Reisbick
(Brookhaven National Laboratory)
Myung-Geun Han
(Brookhaven National Laboratory)
Alexandre Pofelski
(Brookhaven National Laboratory)
Chunguang Jing
(Euclid Techlabs)
Yimei Zhu
(Brookhaven National Laboratory)
With the development of the laser-free ultrafast electron microscope (UEM) at Brookhaven National Laboratory, direct visualization of materials’ structural dynamics with nanometer-picosecond spatiotemporal resolution can be achieved. Instead of using laser pulses as the excitation pump, transverse radio frequency (RF) electrical signals are sent to the sample devices via an impedance matched RF sample holder. The dynamics can then be probed by the temporally synchronized electron pulse-trains generated by a RF cavity installed in the UEM.
In this work, we study the spin-wave propagation dynamics in patterned permalloy (Py, Ni80Fe20) thin films using the laser-free UEM in Lorentz mode. Oscillating magnetic fields generated by the microwave currents are applied as local excitation to the Py pattern via a coplanar waveguide (CPW). The dynamics of spin-wave excitation from various magnetic domain configurations will be reported and discussed. Micromagnetic simulations will also be presented to compare with the experimental results.
Â
*The work was supported by DOE-BES, Materials Science and Engineering Division under Contract No. DESC0012704.
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700