Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session S54: Tuning Magnetism and Transport in Nano-Composites and Heterostructures
8:00 AM–11:00 AM,
Thursday, March 17, 2022
Room: McCormick Place W-476
Sponsoring Units: GMAG DMP
Chair: Amit Chanda, University of South Florida
Abstract: S54.00006 : Py-Cu Graded-Index Magnonic Waveguides*
9:24 AM–9:36 AM
Kristen S Repa
Kristen S Repa
Casey W Miller
(Rochester Institute of Technology)
We grow films via sputter deposition with a 10 nm core of Py0.8Cu0.2 that is symmetrically bound by 10 nm of Cu and 10 nm of Py0.6Cu0.4. Py-Cu alloys are attractive for this study because we can easily tune magnetic properties by changing the Cu content (TC decreases as Cu content increases).
We measure samples using ferromagnetic resonance (FMR) with frequencies from 3-20 GHz and fit results to the Kittel equation. We extract values for the Gilbert damping parameter and inhomogeneous broadening, which informs us of how magnons propagate through each film.
Ideally, if we reverse the magnetic layers, instead of seeing total internal reflection, we should observe a complete spin absorber.
*This work is supported by NSF Grant #1609066
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
1 Physics Ellipse, College Park, MD 20740-3844
Editorial Office 1 Research Road, Ridge, NY 11961-2701 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700