[13p-S302-1~15] 10.1 新物質・新機能創成（作製・評価技術）

▲ [13p-S302-3] Topological spin texture-mediated unconventional Hall effect in a 2D ferromagnet

〇(P)Samik Duttagupta^1,2,3、Rajeswari Roy Chowdhury⁴、Oleg Tretiakov⁵、Chandan Patra⁴、Sudarshan Sharma⁴、Hideo Ohno^1,2,3,6,7、Shunsuke Fukami^1,2,3,6,7、Ravi Prakash Singh⁴ (1.CSIS, Tohoku Univ.、2.CSRN, Tohoku Univ.、3.RIEC, Tohoku Univ.、4.IISERB、5.UNSW、6.CIES, Tohoku Univ.、7.AIMR, Tohoku Univ.)

キーワード：2D magnetism, skyrmions, Topological Hall effect

Topological magnetic textures provide an attractive platform for future spintronic and quantum information processing devices. The discovery of 2D layered magnetic van der Waals (vdW) materials with strong spin-orbit interaction have opened the possibility for realizing a variety of non-collinear topological spin textures, down to the monolayer limit. Among 2D vdW ferromagnets (FMs), metallic Fe₃GeTe₂ is a promising candidate owing to its high Curie temperature, large magnetic anisotropy, and stabilization of skyrmion and chiral spin-spiral structures. However, an understanding of the factors responsible for the stabilization of these exotic spin textures and associated magnetoresistive manifestations have remained elusive. Here, we clarify the underlying physics by investigating the impact of doping at the transition metal site of 2D FM Fe₃GeTe₂.