journal article·2020-10-01Open access

Room-temperature perpendicular magnetic anisotropy of Pt/Co/AlOx trilayers on SrTiO3 (001)

Ye Du, Shoma Arai, Shingo Kaneta-Takada, Le Duc Anh, Shutaro Karube, Makoto Kohda, Shinobu Ohya, Junsaku Nitta

AIP Advances· Volume 10· Issue 10

Abstract

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.
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Research context

OpenAlex topics: Electronic and Structural Properties of Oxides · Magnetic and transport properties of perovskites and related materials · Magnetic properties of thin films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Materials Science, Tohoku University 1 , Sendai 980-8579, Japan

Center for Science and Innovation in Spintronics, Tohoku University 2 , Sendai 980-8577, Japan

Department of Electrical Engineering and Information Systems, The University of Tokyo 3 , Bunkyo, Tokyo 113-8656, Japan

Institute of Engineering Innovation, The University of Tokyo 4 , Bunkyo, Tokyo 113-8656, Japan

PRESTO, Japan Science and Technology Agency 5 , 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan

Center for Spintronics Research Network, Tohoku University 6 , Sendai 980-8577, Japan

Division for the Establishment of Frontier Sciences, Tohoku University 7 , Sendai 980-8577, Japan

Center for Spintronics Research Network (CSRN), The University of Tokyo 8 , Bunkyo, Tokyo 113-8656, Japan

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