Study on tunable spin-wave spin current

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H01798
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 29010:Applied physical properties-related
• Research Institution: Kyoto University
• Principal Investigator: Ohshima Ryo 京都大学, 工学研究科, 助教 (10825011)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: スピントロニクス / スピン波

Outline of Final Research Achievements

This study aims to realize a control of spin-wave spin current in a waveguide made of ferromagnetic metals. A decay of spin-wave spin current by attaching gate electrodes and its origin were studied. A modulation of magnetization damping via introducing several buffer layers and applying gate electric field was studied by a ferromagnetic resonance measurement. Systematic studies on spin-wave spin current transport in nonmagnetic/ferromagnetic bilayers enables us to find a condition to realize the separation of spin-wave spin current in top/bottom sides.

Free Research Field

スピントロニクス

Academic Significance and Societal Importance of the Research Achievements

スピン波スピン流は、スピン情報を利用した省電力スピントロニクスデバイスへの応用が検討されている。本研究の成果はスピン波スピン流の回路設計に指針を与えるとともに、電荷レスの情報輸送というスピン波スピン流の特徴を活かすジュール熱による損失の小さな制御手法であるゲート電圧によるスピン波スピン流の緩和・整流性・動作周波数の制御の実現に大きく貢献する結果と言える。