antiferromagnetic magnon spin valve

2018 Fiscal Year Final Research Report

• Project/Area Number: 17K14331
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: Tohoku University
• Principal Investigator: Hou Dazhi 東北大学, 材料科学高等研究所, 助教 (00704355)
• Project Period (FY): 2017-04-01 – 2019-03-31
• Keywords: antiferromagnet / spin Hall effect / SMR

Outline of Final Research Achievements

We succeed to manipulate the spin transmission of an antiferromagnetic insulator by external
magnetic field which rotates the Neel vector. A new phenomenon "spin colossal magnetoresistance" is established in this study. This work also lays the foundation for the development of insulator-based spin current circuit. In addition, the magnetic field angle dependence of the SMR in a heavy metal/antiferromagnetic insulator bilayer is calculated analytically.

Free Research Field

Spintronics

Academic Significance and Societal Importance of the Research Achievements

我々は、反強磁性絶縁体に新しい効果、巨大スピン磁気抵抗を発見した。 これは全絶縁体スピン流回路への実質的な進歩であり、これは動作中のエネルギーコストがはるかに低く、それ故にグリーン社会に不可欠な装置である。 スピン流制御のメカニズムも我々の研究でよく理解されており、それはさらなるデバイス開発の基礎を築くものである。