Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session A54: Skyrmions and Chiral Spin Textures in Thin Films and Multilayers
8:00 AM–10:36 AM,
Monday, March 6, 2023
Room: Room 306
Sponsoring
Unit:
GMAG
Chair: Mi-Young Im, Lawrence Berkeley National Laboratory
Abstract: A54.00013 : S-shaped Magnetic Configurational States in Individual Square Permalloy Particles*
10:24 AM–10:36 AM
Presenter:
Barry N Costanzi
(Carleton College)
Author:
Barry N Costanzi
(Carleton College)
We experimentally observe multiple stable configurational states in isolated ~200 nm square permalloy particles via the anisotropic magnetoresistance. Results are corroborated with micromagnetic simulations using mumax3. We observe a U-shaped configuration at zero field in larger particles with an applied field swept perpendicular to the square’s edge, and an S-shaped configuration at smaller sizes and for slightly off-axis field angles. This result indicates particles of this size cannot be described by a single collective coordinate as in larger particles, and instead the full configurational state must be considered.
*This work was supported by National Science Foundation Grant No. DMR 1609782 and DMR 2103704. Portions of this work were conducted in the Minnesota Nano Center, which is supported by the National Science Foundation through the National Nanotechnology Coordinated Infrastructure (NNCI) under Award Number ECCS-2025124.
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