[23a-B201-1~12] 10.4 半導体・トポロジカル・超伝導・強相関スピントロニクス

▲ [23a-B201-10] Perpendicular and 100% switching of noncollinear antiferromagnetic order in the chiral antiferromagnet Mn₃Sn by electric current

〇Tomoya Higo^1,2,3、Kouta Kondou^3,4、Takuya Nomoto^5,6、Masanobu Shiga²、Shoya Sakamoto²、Xianzhe Chen²、Daisuke Nishio-Hamane²、Ryotaro Arita^3,4,5、Yoshichika Otani^2,3,4,7、Shinji Miwa^2,3,7、Satoru Nakatsuji^1,2,3,7,8 (1.Dept. of Phys., UTokyo、2.ISSP, UTokyo、3.JST CREST、4.RIKEN CEMS、5.RCAST, UTokyo、6.JST PREST、7.TSQSI, UTokyo、8.Johns Hopkins Univ.)

キーワード：Weyl semimetal, Antiferromagnetic spintronics, Spin-orbit torque

Electrical control of a magnetic state lays the foundation for information technologies. Spin–orbit torque (SOT) provides an efficient mechanism for the electrical manipulation of magnetic orders. In particular, SOT switching of perpendicular magnetization in nanoscale ferromagnetic bits has enabled the development of stable, reliable and low-power memories and computation. Likewise, for antiferromagnetic (AF) spintronics, electrical bidirectional switching of an AF order in a perpendicular geometry may have huge impacts, given its potential advantage for high-density integration and ultrafast operation. Here we report the experimental realization of perpendicular and full SOT switching of an AF binary state in the chiral antiferromagnet Mn₃Sn.