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Room-temperature skyrmion lattice in a layered magnet (Fe0.5Co0.5)5GeTe2.
Zhang, Hongrui; Raftrey, David; Chan, Ying-Ting; Shao, Yu-Tsun; Chen, Rui; Chen, Xiang; Huang, Xiaoxi; Reichanadter, Jonathan T; Dong, Kaichen; Susarla, Sandhya; Caretta, Lucas; Chen, Zhen; Yao, Jie; Fischer, Peter; Neaton, Jeffrey B; Wu, Weida; Muller, David A; Birgeneau, Robert J; Ramesh, Ramamoorthy.
Afiliação
  • Zhang H; Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, CA, USA.
  • Raftrey D; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
  • Chan YT; Physics Department, University of California, Santa Cruz, Santa Cruz, CA, USA.
  • Shao YT; Department of Physics and Astronomy, Rutgers University, Piscataway, NJ, USA.
  • Chen R; School of Applied and Engineering Physics, Cornell University, Ithaca, NY, USA.
  • Chen X; Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, CA, USA.
  • Huang X; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
  • Reichanadter JT; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
  • Dong K; Department of Physics, University of California, Berkeley, Berkeley, CA, USA.
  • Susarla S; Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, CA, USA.
  • Caretta L; Department of Electrical Engineering, University of California, Berkeley, Berkeley, CA, USA.
  • Chen Z; Department of Chemistry, University of California, Berkeley, Berkeley, CA, USA.
  • Yao J; Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, CA, USA.
  • Fischer P; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
  • Neaton JB; Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, CA, USA.
  • Wu W; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
  • Muller DA; Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, CA, USA.
  • Birgeneau RJ; School of Applied and Engineering Physics, Cornell University, Ithaca, NY, USA.
  • Ramesh R; Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, CA, USA.
Sci Adv ; 8(12): eabm7103, 2022 Mar 25.
Article em En | MEDLINE | ID: mdl-35319983
Novel magnetic ground states have been stabilized in two-dimensional (2D) magnets such as skyrmions, with the potential next-generation information technology. Here, we report the experimental observation of a Néel-type skyrmion lattice at room temperature in a single-phase, layered 2D magnet, specifically a 50% Co-doped Fe5GeTe2 (FCGT) system. The thickness-dependent magnetic domain size follows Kittel's law. The static spin textures and spin dynamics in FCGT nanoflakes were studied by Lorentz electron microscopy, variable-temperature magnetic force microscopy, micromagnetic simulations, and magnetotransport measurements. Current-induced skyrmion lattice motion was observed at room temperature, with a threshold current density, jth = 1 × 106 A/cm2. This discovery of a skyrmion lattice at room temperature in a noncentrosymmetric material opens the way for layered device applications and provides an ideal platform for studies of topological and quantum effects in 2D.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2022 Tipo de documento: Article
Texto completo
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2022 Tipo de documento: Article