Extrinsic Surface Magnetic Anisotropy Contribution in Pt/Y3Fe5O12Interface in Longitudinal Spin Seebeck Effect by Graphene Interlayer
- Authors
- Lee, Won-Yong; Park, No-Won; Kang, Min-Sung; Kim, Gil-Sung; Yoon, Young-Gui; Lee, Suheon; Choi, Kwang-Yong; Kim, Keun Soo; Kim, Jin-Hyuk; Seong, Maeng-Je; Kikkawa, Takashi; Saitoh, Eiji; Lee, Sang-Kwon
- Issue Date
- Sep-2021
- Publisher
- American Chemical Society
- Keywords
- ferromagnetic insulator; longitudinal spin Seebeck effect; magnetic proximity; single layer graphene; spin mixing conductance; spin transport; surface magnetic anisotropy
- Citation
- ACS Applied Materials and Interfaces, v.13, no.37, pp 45097 - 45104
- Pages
- 8
- Journal Title
- ACS Applied Materials and Interfaces
- Volume
- 13
- Number
- 37
- Start Page
- 45097
- End Page
- 45104
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/50140
- DOI
- 10.1021/acsami.1c13180
- ISSN
- 1944-8244
1944-8252
- Abstract
- A recent study found that magnetization curves for Y3Fe5O12 (YIG) slab and thick films (>20 μm thick) differed from bulk system curves by their longitudinal spin Seebeck effect in a Pt/YIG bilayer system. The deviation was due to intrinsic YIG surface magnetic anisotropy, which is difficult to adopt extrinsic surface magnetic anisotropy even when in contact with other materials on the YIG surface. This study experimentally demonstrates evidence for extrinsic YIG surface magnetic anisotropy when in contact with a diamagnetic graphene interlayer by observing the spin Seebeck effect, directly proving intrinsic YIG surface magnetic anisotropy interruption. We show the Pt/YIG bilayer system graphene interlayer role using large area single and multilayered graphenes using the longitudinal spin Seebeck effect at room temperature, and address the presence of surface magnetic anisotropy due to magnetic proximity between graphene and YIG layer. These findings suggest a promising route to understand new physics of spin Seebeck effect in spin transport. © 2021 American Chemical Society.
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