[23a-A205-1~13] 10.2 Fundamental and exploratory device technologies for spin

▼ [23a-A205-13] Dot size dependence of thermal stability in non-collinear antiferromagnet Mn₃Sn

〇(M1)Yuma Sato^1,2, Takeuchi Yutaro³, Yuta Yamane^1,4, Yoon Ju-Youg^1,2, Shun Kanai^1,2,5, Ieda Jun'ichi⁶, Ohno Hideo^1,2,3,5,7, Shunsuke Fukami^1,2,3,5,7,8 (1.Laboratory for Nanoelectronics and Spintronics, RIEC, Tohoku Univ., 2.Graduate School of Engineering, Tohoku Univ., 3.WPI-AIMR, Tohoku Univ., 4.FRIS, Tohoku Univ., 5.CSIS, Tohoku Univ, 6.ASRC, JAEA, 7.CIES, Tohoku Univ, 8.Inamori Research Institute for Science)

Keywords:Antiferromagnetic spintronics, non-collinear antiferromagnet

Antiferromagnets have been actively studied in spintronics owing to their unique attributes such as the high-speed dynamics and small stray fields. Among them, non-collinear antiferromagnets with chiral spin structures exhibit various topological phenomena, attracting increasing attention. Furthermore, recent studies showed current-induced reversal and rotation of the chiral-spin structure in thin-film structures. Meanwhile, the stability of antiferromagnetic spin structure against the thermal fluctuation has not been studied well despite its importance as a figure of merit to characterize the retention time of spin structure as well as the critical current for electrical manipulation. Here, we study the size dependence of the thermal stability factor in non-collinear antiferromagnetic Mn₃Sn nanodots.