Developing high temperature superconducting spintronics

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K23374
• Research Category: Fund for the Promotion of Joint International Research (Home-Returning Researcher Development Research)
• Allocation Type: Multi-year Fund
• Review Section: Mathematics/Physics
• Research Institution: Nagoya University
• Principal Investigator: Sachio Komori 名古屋大学, 理学研究科, 助教 (00880113)
• Project Period (FY): 2021-03-12 – 2024-03-31
• Keywords: 高温超伝導 / スピントロニクス / スピンバルブ / スピン流

Outline of Final Research Achievements

At high-temperature superconductor/ferromagnet interfaces, we have demonstrated an unconventional magnetic exchange interaction, spin-transport, and proximity effects originating from an anisotropic superconductivity of cuprates and high spin-polarization of manganites. We found that the mechanism of the interaction between superconductivity and magnetism depends on the electrical resistivity of ferromagnetic materials. The results are useful in designing and controlling novel electronic devices based on the unconventional interplay at high-temperature superconductor/ferromagnet interfaces.

Free Research Field

超伝導

Academic Significance and Societal Importance of the Research Achievements

超伝導エレクトロニクスは高速・低消費電力の古典演算だけでなく超伝導量子コンピューティングにも役立つため、その実用化に向けた研究が精力的に行われている。超伝導エレクトロニクスには金属超伝導体が主に用いられるが、本研究によって、酸化物高温超伝導体でのみ観測される磁性と超伝導の強い相互作用が実証され、新たな機能性を有する酸化物超伝導エレクトロニクスの実現につながる知見が得られた。