Spin detection in two-dimensional van der Waals magnetic trichalcogenide

2019 Fiscal Year Final Research Report

• Project/Area Number: 19K21030
• Project/Area Number (Other): 18H05840 (2018)
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund (2019); Single-year Grants (2018)
• Review Section: 0202:Condensed matter physics, plasma science, nuclear engineering, earth resources engineering, energy engineering, and related fields
• Research Institution: Tohoku University
• Principal Investigator: Idzuchi Hiroshi 東北大学, 材料科学高等研究所, 助教 (20784507)
• Project Period (FY): 2018-08-24 – 2020-03-31
• Keywords: 2D material / magnetism / spintronics

Outline of Final Research Achievements

In recent years, the novel physical properties of Dirac electronic systems and the relationship between the topological aspects of materials and physical properties have attracted attention. However, conventionally, the relationship with the magnetism has not been clarified. In this study, we focus on the atomic layer thin two-dimensional van der Waals trichalcogenide magnetic substance group in which the physics of the Dirac electron system and the magnetism due to the d-electrons of transition metal elements coexist, and their spin properties are studied. In this research, we focused on the spin physical properties of antiferromagnetic materials in such a group of materials, and we were able to detect the spin physical properties of minute thin slices by spintronics method, which was difficult to detect by conventional methods. We also observed an increase in transition temperature in a two-dimensional magnetic material using an antiferromagnetic interface.

Free Research Field

2D material, spintronics

Academic Significance and Societal Importance of the Research Achievements

2010年のノーベル物理学賞に象徴されるように、グラフェンに代表される2次元ファンデルワールス物質は、高い結晶性をもち且つ単原子層薄さの試料を容易に作製できる層状物質であるため、基礎応用両面から近年着目されている。反強磁性体のスピン物性の検出を捉えた本研究成果は、2次元磁性体の磁気物性に迫る学術的意義をもつ。また磁気転移温度の上昇を観測し、科学技術の側面からも意義のある成果と考えられる。