Current-driven nucleation and propagation of antiferromagnetic skyrmionium

S. A. Obadero, Y. Yamane, C. A. Akosa, G. Tatara

研究成果: Article査読

7 被引用数 (Scopus)


We present a theoretical study on nucleation and propagation of antiferromagnetic skyrmionium induced by spin current injection. A skyrmionium, also known as 2π skyrmion, is a vortexlike magnetic structure characterized by a topological charge, the so-called skyrmion number, being zero. We find that an antiferromagnetic skyrmionium can be generated via a local injection of spin current with toroidal distribution. We examine the threshold current density for successful skyrmionium nucleation and the robustness of the proposed mechanism against thermal fluctuation. A spatially uniform spin current is then demonstrated to induce propagation of the skyrmionium. We derive an expression for the skyrmionium velocity based on a collective-coordinate model, which agrees well with our numerical results.

ジャーナルPhysical Review B
出版ステータスPublished - 2020 7月 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学


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