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Room-temperature intrinsic ferromagnetism in epitaxial CrTe2 ultrathin films.
Zhang, Xiaoqian; Lu, Qiangsheng; Liu, Wenqing; Niu, Wei; Sun, Jiabao; Cook, Jacob; Vaninger, Mitchel; Miceli, Paul F; Singh, David J; Lian, Shang-Wei; Chang, Tay-Rong; He, Xiaoqing; Du, Jun; He, Liang; Zhang, Rong; Bian, Guang; Xu, Yongbing.
Afiliación
  • Zhang X; Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, Nanjing University, Nanjing, China.
  • Lu Q; Department of Physics and Astronomy, University of Missouri, Columbia, MO, USA.
  • Liu W; Department of Physics and Astronomy, University of Missouri, Columbia, MO, USA.
  • Niu W; Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, Nanjing University, Nanjing, China.
  • Sun J; Department of Electronic Engineering, Royal Holloway University of London, Egham, Surrey, UK.
  • Cook J; New Energy Technology Engineering Laboratory of Jiangsu Provence & School of Science, Nanjing University of Posts and Telecommunications, Nanjing, China.
  • Vaninger M; Department of Electronic Engineering, Royal Holloway University of London, Egham, Surrey, UK.
  • Miceli PF; Department of Physics and Astronomy, University of Missouri, Columbia, MO, USA.
  • Singh DJ; Department of Physics and Astronomy, University of Missouri, Columbia, MO, USA.
  • Lian SW; Department of Physics and Astronomy, University of Missouri, Columbia, MO, USA.
  • Chang TR; Department of Physics and Astronomy, University of Missouri, Columbia, MO, USA.
  • He X; Department of Chemistry, University of Missouri, Columbia, MO, USA.
  • Du J; Department of Physics, National Cheng Kung University, Tainan, Taiwan.
  • He L; Department of Physics, National Cheng Kung University, Tainan, Taiwan.
  • Zhang R; Center for Quantum Frontiers of Research and Technology (QFort), Tainan, Taiwan.
  • Bian G; Electron Microscopy Core Facility, University of Missouri, Columbia, MO, USA.
  • Xu Y; Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, MO, USA.
Nat Commun ; 12(1): 2492, 2021 May 03.
Article en En | MEDLINE | ID: mdl-33941773
While the discovery of two-dimensional (2D) magnets opens the door for fundamental physics and next-generation spintronics, it is technically challenging to achieve the room-temperature ferromagnetic (FM) order in a way compatible with potential device applications. Here, we report the growth and properties of single- and few-layer CrTe2, a van der Waals (vdW) material, on bilayer graphene by molecular beam epitaxy (MBE). Intrinsic ferromagnetism with a Curie temperature (TC) up to 300 K, an atomic magnetic moment of ~0.21 [Formula: see text]/Cr and perpendicular magnetic anisotropy (PMA) constant (Ku) of 4.89 × 105 erg/cm3 at room temperature in these few-monolayer films have been unambiguously evidenced by superconducting quantum interference device and X-ray magnetic circular dichroism. This intrinsic ferromagnetism has also been identified by the splitting of majority and minority band dispersions with ~0.2 eV at Г point using angle-resolved photoemission spectroscopy. The FM order is preserved with the film thickness down to a monolayer (TC ~ 200 K), benefiting from the strong PMA and weak interlayer coupling. The successful MBE growth of 2D FM CrTe2 films with room-temperature ferromagnetism opens a new avenue for developing large-scale 2D magnet-based spintronics devices.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2021 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
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Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2021 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido