Physical properties of topological spin textures and fundamentals toward its applications

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H01364
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 21050:Electric and electronic materials-related
• Research Institution: Shinshu University
• Principal Investigator: Liu Xiaoxi 信州大学, 学術研究院工学系, 教授 (10372509)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: Spintronics / Topological textures / Memory / Computing

Outline of Final Research Achievements

Topological spin textures have been considered as prominent information carriers due to their nano-size, room temperature stability, ultra-low energy consumption and high density. The object of this research focused on the application of topological spin textures for next-generation memory and non-conventional computing devices. We have systematically investigated the driving properties of topological spin textures by electric field, magnetic field, thermal gradients, and stress. We have successfully developed effective energy barriers to protect topological spin-textures in channels. We have observed the transmission between magnetic skyrmions and bimerons. The phenomenon has potential applications in advanced neuro morphological computing. We have also proposed universal Q-bits based on helicity of topological spin-textures.

Free Research Field

Spintronics

Academic Significance and Societal Importance of the Research Achievements

高速、高密度・大容量・低消費電力の情報デバイスは、Society5.0、ユビキタス・IoT化社会では重要な役割を果たしており、将来もその役割は変わることが無い。本研究のトポロジカルスピンテクスチャはサイズが小さいため高密度・大容量の特徴を持つ。電子のスピンに基づくためジュール熱の影響しない、つまり低消費電力の特徴を持つ。本研究の実施により、トポロジカルスピンテクスチャの先進機械学習、高速・高セキュリティ量子計算への応用の基礎を構築した。