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Room-temperature perpendicular magnetic anisotropy of Pt/Co/AlO<i>x</i> trilayers on SrTiO3 (001)
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- Ye Du
- Department of Materials Science, Tohoku University 1 , Sendai 980-8579, Japan
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- Shoma Arai
- Department of Electrical Engineering and Information Systems, The University of Tokyo 3 , Bunkyo, Tokyo 113-8656, Japan
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- Shingo Kaneta-Takada
- Department of Electrical Engineering and Information Systems, The University of Tokyo 3 , Bunkyo, Tokyo 113-8656, Japan
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- Le Duc Anh
- Department of Electrical Engineering and Information Systems, The University of Tokyo 3 , Bunkyo, Tokyo 113-8656, Japan
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- Shutaro Karube
- Department of Materials Science, Tohoku University 1 , Sendai 980-8579, Japan
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- Makoto Kohda
- Department of Materials Science, Tohoku University 1 , Sendai 980-8579, Japan
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- Shinobu Ohya
- Department of Electrical Engineering and Information Systems, The University of Tokyo 3 , Bunkyo, Tokyo 113-8656, Japan
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- Junsaku Nitta
- Department of Materials Science, Tohoku University 1 , Sendai 980-8579, Japan
Description
<jats:p>We demonstrate room-temperature perpendicular magnetic anisotropy (PMA) in Pt/Co/AlOx trilayers sputter-deposited onto a SrTiO3 (STO) (001) substrate. Reflection high-energy electron diffraction and x-ray diffraction results confirm the two-dimensional polycrystalline nature for both Pt and Co layers in PMA films, which are (111) oriented in the out-of-plane direction. While the PMA in Pt/Co/AlOx trilayers on STO (001) is found to have interfacial origins, sizable PMA is maintained when Pt layer thickness is as thin as 1 nm, which is several times to one order of magnitude smaller than the reported values of the spin diffusion length for Pt, thus facilitating spin transmission along the thin-film-normal direction. With the STO (001) substrate serving as the fundamental building block for realizing giant Rashba spin splitting, this work provides a feasible platform for the investigation of magnetization switching in two-dimensional-electron-gas-based magnetic hetero-structures at room temperature.</jats:p>
Journal
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- AIP Advances
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AIP Advances 10 (10), 2020-10-01
AIP Publishing
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Details 詳細情報について
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- CRID
- 1360853567590359168
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- ISSN
- 21583226
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- Article Type
- journal article
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- Data Source
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- Crossref
- KAKEN
- OpenAIRE
