Functional properties of Yttrium Iron Garnett thin films on graphene-coated Gd3Ga5O12 for remote epitaxial transfer
- Air Force Research Lab. (AFRL), Wright-Patterson AFB, OH (United States); UES Inc., Dayton, OH (United States)
- Air Force Research Lab. (AFRL), Wright-Patterson AFB, OH (United States)
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Yonsei Univ., Seoul (Korea, Republic of)
- Argonne National Lab. (ANL), Lemont, IL (United States). Advanced Photon Source (APS)
- Argonne National Lab. (ANL), Lemont, IL (United States). Advanced Photon Source (APS); Northern Illinois Univ., DeKalb, IL (United States)
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
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 strong magnetic properties and low microwave losses. 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. Further, 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 15.4x10-4 vs 3.4x10-4 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.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- US Air Force Office of Scientific Research (AFOSR); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-06CH11357; FA955020RXCOR074
- OSTI ID:
- 1909573
- Alternate ID(s):
- OSTI ID: 1868119
- Journal Information:
- Journal of Magnetism and Magnetic Materials, Vol. 556, Issue 169440; ISSN 0304-8853
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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