Spin effect in two-dimensional antiferromagnet interface

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K14399
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
• Research Institution: The University of Tokyo (2021-2022); Tohoku University (2020)
• Principal Investigator: Idzuchi Hiroshi 東京大学, 大学院理学系研究科(理学部), 特任准教授 (20784507)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: スピントロニクス / 二次元物質 / 反強磁性

Outline of Final Research Achievements

We study antiferromagnetic phase in two dimensional material and focus on the spin effect at the interface. Particularly, higy crystalinity in two-dimensional antiferromagnet and heterointerface were used to study how excitaion (antiferromagnetic magnon) and order parameter should be correlated to the interfacial spin effect. By using electic detection method, we succeeded in detecting interfacial spin effect. Futther, we found new phenomena over the expected effect in antifferomagnetic phase and undestand it by introducing new concept. We succeeded in applying the framework to multiple materials.

Free Research Field

スピントロニクス

Academic Significance and Societal Importance of the Research Achievements

スピントロ二クス分野において従来基幹をなしていた強磁性体と比べて、本研究で対象とした反強磁性体では、その磁化ダイナミクスのスピードが2～３桁高く、高速動作が期待できる。このような反強磁性体において、その信号を電気的に検出し、反強磁性特有の性質を明らかにできたことは、将来のスピントロニクスデバイスの原理を考究するうえで重要なものと考える。