Functional properties of Yttrium Iron Garnett thin films on graphene-coated Gd3Ga5O12 for remote epitaxial transfer
Name
1-s2.0-S0304885322003717-am.pdf
Size
909.49 KB
Format
Adobe PDF
Checksum (MD5)
8ef0185939ff09fe3efb9dc3f306c67d
Author(s)
Leontsev, S.
Shah, P.J.
Kum, H.S.
McChesney, J.L.
Rodolakis, F.M.
van Veenendaal, M.
Velez, M.
Rao, R.
Haskel, D.
Kim, J.
Date Issued
August 2022
Journal
Journal of Magnetism and Magnetic Materials
Publisher
Elsevier BV
Citation
Leontsev, S., Shah, P.J., Kum, H.S., McChesney, J.L., Rodolakis, F.M. et al. 2022. "Functional properties of Yttrium Iron Garnett thin films on graphene-coated Gd3Ga5O12 for remote epitaxial transfer." Journal of Magnetism and Magnetic Materials, 556.
Version
Author's final manuscript
Abstract
Remote epitaxial growth via a graphene interlayer and subsequent mechanical exfoliation of a free-standing membrane is a recently developed technique used to transfer complex oxide thin films onto non-native substrates to form heterogeneously integrated structures for various device applications. One such oxide is Yttrium Iron Garnet (YIG), a material of choice for a wide range of magnetoelectric and spintronic devices owing to its ferromagnetism with high Curie temperature as well as high quality factor and low losses in microwave frequencies. YIG is predominantly grown on lattice matched Gadolinium Gallium Garnet (GGG) substrates, but by utilizing the remote epitaxy technique, high quality YIG films can be transferred from GGG onto another substrate such as piezoelectric Lithium Niobate (LN). Mechanical strain coupling between the layers and magnetostrictive nature of YIG would allow for the investigation of the interplay in YIG/LN structures leading to the design of novel frequency agile magneto-acoustic devices. In this study functional properties of a YIG film grown using PLD on graphene-coated GGG substrate were investigated and compared to traditional YIG on GGG. Both materials were characterized in terms of crystal structure, surface morphology, FMR and Gilbert damping, and Raman and XAS spectroscopy. It was found that YIG on graphene-coated GGG exhibits significantly higher microwave losses than standard YIG on GGG (FMR linewidth 30.9 vs 2.1 Oe at 10 GHz, and Gilbert damping coefficient 15.4 × 10-4 vs 3.4 × 10-4 respectively), which was attributed to increased concentration of Fe2+ cations in YIG/Graphene/GGG. While the damping is higher in these studied films compared to YIG grown directly on GGG, the resulting properties are still very favorable compared to many other competing materials which can be grown without the need for lattice matched substrates, such as metallic ferromagnets.
Subjects
Condensed Matter Physics
Electronic, Optical and Magnetic Materials
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.jmmm.2022.169440
