Acoustically driven ferromagnetic resonance in YIG thin films
Name
052402_1_5.0211718.pdf
Description
Published version
Size
2.35 MB
Format
Adobe PDF
Checksum (MD5)
1f055f6d615d5a73ed3553a202aa9700
Author(s)
Wong, Thomas
Park, Jihun
Hayashi, Kensuke
Gross, Miela J
Kim, Ryan
Wang, Xinjun
Lofland, Samuel E
Orloff, Nathan D
Gopman, Daniel B
Lee, Seunghun
Date Issued
July 31, 2024
Journal
Applied Physics Letters
Publisher
AIP Publishing
Citation
Thomas Wong, Jihun Park, Kensuke Hayashi, Miela J. Gross, Ryan Kim, Xinjun Wang, Samuel E. Lofland, Nathan D. Orloff, Daniel B. Gopman, Seunghun Lee, Paul A. Crowell, Caroline A. Ross, Ichiro Takeuchi; Acoustically driven ferromagnetic resonance in YIG thin films. Appl. Phys. Lett. 29 July 2024; 125 (5): 052402.
Version
Final published version
Abstract
Acoustically driven ferromagnetic resonance (ADFMR) is a platform that enables efficient generation and detection of spin waves via magnetoelastic coupling with surface acoustic waves (SAWs). While previous studies successfully achieved ADFMR in ferromagnetic metals, there are only few reports on ADFMR in magnetic insulators such as yttrium iron garnet (Y3Fe5O12, YIG) despite more favorable spin wave properties, including low damping and long coherence length. The growth of high-quality YIG films for ADFMR devices is a major challenge due to poor lattice-matching and thermal degradation of the piezoelectric substrates during film crystallization. In this work, we demonstrate ADFMR of YIG thin films on LiNbO3 (LNO) substrates. We employed a SiOx buffer layer and rapid thermal annealing for crystallization of YIG films with minimal thermal degradation of LNO substrates. Optimized ADFMR device designs and time-gating measurements were used to enhance the ADFMR signal and overcome the intrinsically low magnetoelastic coupling of YIG. YIG films have a polycrystalline structure with an in-plane easy direction due to biaxial stresses induced during cooling after crystallization. The YIG device shows clear ADFMR patterns with maximum absorption for H ≈ 160 mT parallel to SAW propagation, which is consistent with our simulation results based on existing theoretical models. These results expand possibilities for developing efficient spin wave devices with magnetic insulators.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1063/5.0211718
