Direct observation of magnetic skyrmions in a nano-sized chiral magnet fabricated by controlling microstrucure

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04626
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 26010:Metallic material properties-related
• Research Institution: Akita University
• Principal Investigator: So Yeong-Gi 秋田大学, 理工学研究科, 准教授 (10719678)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 合金 / 磁気スキルミオン / 電子顕微鏡

Outline of Final Research Achievements

Magnetic skyrmions are promising for use in future data storage devices because of their topological stability at nanometer-scale dimensions. In this study, B20-type FeGe alloy, a typical example of chiral magnets that host stable magnetic skyrmions, was synthesized by means of mechanical alloying, and magnetic structure in the nano-grained B20-FeGe was observed using differential phase-contrast scanning transmission electron microscopy.

Free Research Field

金属物性

Academic Significance and Societal Importance of the Research Achievements

情報化社会において代表的な情報記録媒体である磁気メモリの情報高密度化は重要課題である。磁気スキルミオンを用いた次世代メモリは従来メモリを凌駕する記録密度や省エネが見込まれる。メモリ中のようなナノスケール空間内で磁気スキルミオンがどのような状態で形成するのか明らかにすることは、今後のメモリ開発において基礎となる知見を与える。