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Layer-Number-Independent Two-Dimensional Ferromagnetism in Cr3Te4.
Wang, Yue; Kajihara, Shun; Matsuoka, Hideki; Saika, Bruno Kenichi; Yamagami, Kohei; Takeda, Yukiharu; Wadati, Hiroki; Ishizaka, Kyoko; Iwasa, Yoshihiro; Nakano, Masaki.
Afiliación
  • Wang Y; Quantum-Phase Electronics Center and Department of Applied Physics, The University of Tokyo, Tokyo 113-8656, Japan.
  • Kajihara S; Quantum-Phase Electronics Center and Department of Applied Physics, The University of Tokyo, Tokyo 113-8656, Japan.
  • Matsuoka H; Quantum-Phase Electronics Center and Department of Applied Physics, The University of Tokyo, Tokyo 113-8656, Japan.
  • Saika BK; RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan.
  • Yamagami K; Quantum-Phase Electronics Center and Department of Applied Physics, The University of Tokyo, Tokyo 113-8656, Japan.
  • Takeda Y; Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan.
  • Wadati H; Materials Sciences Research Center, Japan Atomic Energy Agency, Sayo-gun, Hyogo 679-5148, Japan.
  • Ishizaka K; Graduate School of Material Science, University of Hyogo, Kobe, Hyogo 678-1297, Japan.
  • Iwasa Y; Quantum-Phase Electronics Center and Department of Applied Physics, The University of Tokyo, Tokyo 113-8656, Japan.
  • Nakano M; RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan.
Nano Lett ; 22(24): 9964-9971, 2022 Dec 28.
Article en En | MEDLINE | ID: mdl-36516275
In a conventional magnetic material, a long-range magnetic order develops in three dimensions, and reducing a layer number weakens its magnetism. Here we demonstrate anomalous layer-number-independent ferromagnetism down to the two-dimensional (2D) limit in a metastable phase of Cr3Te4. We fabricated Cr3Te4 thin films by molecular-beam epitaxy and found that Cr3Te4 could host two distinct ferromagnetic phases characterized with different Curie temperatures (TC). One is the bulk-like "high-TC phase" showing room-temperature ferromagnetism, which is consistent with previous studies. The other is the metastable "low-TC phase" with TC ≈ 160 K, which exhibits a layer-number-independent TC down to the 2D limit in marked contrast with the conventional high-TC phase, demonstrating a purely 2D nature of its ferromagnetism. Such significant differences between two distinct phases could be attributed to a small variation in the doping level, making this material attractive for future ultracompact spintronics applications with potential gate-tunable room-temperature 2D ferromagnetism.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2022 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2022 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos