Study of magnon transistor

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K20362
• Project/Area Number (Other): 18H05346 (2018-2019)
• Research Category: Grant-in-Aid for Challenging Research (Pioneering)
• Allocation Type: Multi-year Fund (2020); Single-year Grants (2018-2019)
• Review Section: Medium-sized Section 29:Applied condensed matter physics and related fields
• Research Institution: Yokohama National University
• Principal Investigator: SEKIGUCHI koji 横浜国立大学, 大学院工学研究院, 教授 (00525579)
• Project Period (FY): 2018-06-29 – 2022-03-31
• Keywords: スピン波 / マグノン / 磁性体

Outline of Final Research Achievements

Energy consumption of electronic device is increasing in this decade. The electronics faces the difficulty to sustain the development of high-performance signal processing with low energy consumption. In magnets, however, there is a possible information carrier which delivers a spin information with low energy consumption. The magnon, the quantum of spin-wave, is not the charged carrier and being free from the electronic Joule heating. The magnon has the possibility to realize ultra-low power consumption devices.
In this project, we explored the essential techniques to construct the magnon-transistor. Spin-wave (magnon) switch was realized by a double-magnonic crystal. Using the nonlinear effect on spin wave, the long-distance signal transfer in soliton form was demonstrated. In case of ferromagnetic iron single crystal, we find that the magnon can be controlled with no bias field.

Free Research Field

スピントロニクス

Academic Significance and Societal Importance of the Research Achievements

電気機器の省エネルギー性能の開発は、地球温暖化などグローバルなエネルギー問題と直結する重要なテーマである。マグノンを用いて電流ゼロ信号演算を可能にする新しいトランジスタ技術を開拓した本研究成果は、この急激に加速する情報化社会的に省エネ性能と高性能化の両立を図る新しいデバイス原理を提供する社会的意義を持っている。マグノンは従来の古典的キャリアではなく量子キャリアであり、将来の量子情報処理技術に発展する可能性をも秘めている。本研究成果で示した、能動的キャリアとしてのマグノン活用技術は量子デバイスでの基礎原理という学術的な意義を持つ。