Imaging Nonlinear Spin Waves in Magnetoacoustic Nanodevices

Hybrid magnetoacoustic material systems offer promising platforms for next-generation sensors and computing applications, but understanding their nonlinear dynamics remains challenging. Here, we use nitrogen vacancy (NV) centers in diamond to spatially map nonlinear magnon scattering processes in FeGaB/LiNbO3 heterostructures with submicron resolution. We observe highly heterogeneous magnetic noise generation under acoustic driving at 1425 MHz, with responses varying dramatically across micron length scales. Time-domain measurements reveal threshold-like nonlinear behavior where NV center spin relaxation rates increase over 2 orders of magnitude as drive power is increased. These findings reveal microscopic noise sources that limit magnetoacoustic sensor performance while simultaneously demonstrating how material engineering and acoustic mode design could enable selective control of nonlinear magnon processes.

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Publication Details

Journal
ACS Applied Nano Materials
Published
2026-03-16
DOI
https://doi.org/10.1021/acsanm.6c00365
Primary Topic
Magnetic properties of thin films
Type
article
Field-Weighted Citation Impact
0.00
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article

Imaging Nonlinear Spin Waves in Magnetoacoustic Nanodevices

Michael Wolf, Lucas Caretta, Jack Guida, Andrew Franson et al.
ACS Applied Nano Materials
Magnetic properties of thin films
article

Imaging Nonlinear Spin Waves in Magnetoacoustic Nanodevices

Michael Wolf, Lucas Caretta, Jack Guida, Andrew Franson, Paul Stevenson, Nian X. Sun, Michael Newburger, Piyush Shah, Siddhartha Ghosh, Nathaniel M. Beaver, Derek A. Bas, Bin Luo, Shih-Wei Chiu, Michael R. Page
article en

Abstract

Hybrid magnetoacoustic material systems offer promising platforms for next-generation sensors and computing applications, but understanding their nonlinear dynamics remains challenging. Here, we use nitrogen vacancy (NV) centers in diamond to spatially map nonlinear magnon scattering processes in FeGaB/LiNbO3 heterostructures with submicron resolution. We observe highly heterogeneous magnetic noise generation under acoustic driving at 1425 MHz, with responses varying dramatically across micron length scales. Time-domain measurements reveal threshold-like nonlinear behavior where NV center spin relaxation rates increase over 2 orders of magnitude as drive power is increased. These findings reveal microscopic noise sources that limit magnetoacoustic sensor performance while simultaneously demonstrating how material engineering and acoustic mode design could enable selective control of nonlinear magnon processes.

ACS Applied Nano MaterialsVol. 9(12)
United States Air Force Research Laboratory (US), John Brown University (US), Universidad del Noreste (MX)
Openalex Percentile: Top 18%
Magnetic properties of thin films
DOIOpen Access PDFOpenAlex
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