Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session F47: Spin Wave Excitation, Manipulation, and Detection
8:00 AM–11:00 AM,
Tuesday, March 3, 2020
Sponsoring Unit: GMAG
Chair: Lijun Zhu
Abstract: F47.00001 : Strongly coupled magnon hybrid systems with permalloy thin films1*
(Argonne Natl Lab)
(Argonne Natl Lab)
In this talk, we will explore the use of permalloy (Ni80Fe20) thin films in hybrid magnon systems. Permalloy is a classical metallic ferromagnet with well-known magnetic dynamic properties and is easy to grow and integrate into complex devices. In the first part, we demonstrate strong coupling of magnons in a permalloy thin-film device to the microwave photons in a coplanar superconducting resonator6, via magnetic dipolar interaction. In the second part, we show strong coupling of permalloy magnons to the spatially nonuniform magnon modes of a YIG film via interfacial coupling7. Besides the interfacial exchange coupling acting as a field-like torque, we also show evidence that spin pumping creates a damping-like coupling torque. This torque leads to an increase in line width for the out-of-phase hybrid mode and a reduction for the in-phase hybrid mode. Our results provide new pathways for implementing on-chip magnonic devices with efficient and coherent information transducers.
*This work was supported by the U.S. DOE, Office of Science, Materials Sciences and Engineering Division and as part of Quantum Materials for Energy Efficient Neuromorphic Computing, an Energy Frontier Research Center funded by the U.S. DOE, Office of Science, as well as AFOSR under grant no. FA9550-19-1-0254.
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
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