Highly Robust Room-Temperature Interfacial Ferromagnetism in Ultrathin Co<sub>2</sub>Si Nanoplates.

Liu, Jialing; Wan, Si; Li, Bo; Li, Bailing; Liang, Jingyi; Lu, Ping; Zhang, Zucheng; Li, Wei; Li, Xin; Huangfu, Ying; Wu, Ruixia; Song, Rong; Yang, Xiangdong; Liu, Chang; Hong, Ruohao; Duan, Xiangfeng; Li, Jia; Duan, Xidong

Highly Robust Room-Temperature Interfacial Ferromagnetism in Ultrathin Co₂Si Nanoplates.

Liu, Jialing; Wan, Si; Li, Bo; Li, Bailing; Liang, Jingyi; Lu, Ping; Zhang, Zucheng; Li, Wei; Li, Xin; Huangfu, Ying; Wu, Ruixia; Song, Rong; Yang, Xiangdong; Liu, Chang; Hong, Ruohao; Duan, Xiangfeng; Li, Jia; Duan, Xidong.

Afiliación

Liu J; Hunan Provincial Key Laboratory of Two-Dimensional Materials, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
Wan S; Hunan Provincial Key Laboratory of Two-Dimensional Materials, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
Li B; College of Semiconductors (College of Integrated Circuits), Hunan University, Changsha 410082, China.
Li B; Hunan Provincial Key Laboratory of Two-Dimensional Materials, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
Liang J; Hunan Provincial Key Laboratory of Two-Dimensional Materials, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
Lu P; Hunan Provincial Key Laboratory of Two-Dimensional Materials, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
Zhang Z; Hunan Provincial Key Laboratory of Two-Dimensional Materials, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
Li W; Hunan Provincial Key Laboratory of Two-Dimensional Materials, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
Li X; Hunan Provincial Key Laboratory of Two-Dimensional Materials, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
Huangfu Y; Hunan Provincial Key Laboratory of Two-Dimensional Materials, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
Wu R; School of Physics and Electronics, Hunan University, Changsha 410082, China.
Song R; Hunan Provincial Key Laboratory of Two-Dimensional Materials, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
Yang X; Institute of Micro/Nano Materials and Devices, Ningbo University of Technology, Zhejiang Institute of Tianjin University, Ningbo 315211, China.
Liu C; School of Physics and Electronics, Hunan University, Changsha 410082, China.
Hong R; School of Physics and Electronics, Hunan University, Changsha 410082, China.
Duan X; Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States.
Li J; Hunan Provincial Key Laboratory of Two-Dimensional Materials, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
Duan X; Hunan Provincial Key Laboratory of Two-Dimensional Materials, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.

Nano Lett ; 24(12): 3768-3776, 2024 Mar 27.

Article en En | MEDLINE | ID: mdl-38477579

ABSTRACT

ABSTRACT

The reduced dimensionality and interfacial effects in magnetic nanostructures open the feasibility to tailor magnetic ordering. Here, we report the synthesis of ultrathin metallic Co2Si nanoplates with a total thickness that is tunable to 2.2 nm. The interfacial magnetism coupled with the highly anisotropic nanoplate geometry leads to strong perpendicular magnetic anisotropy and robust hard ferromagnetism at room temperature, with a Curie temperature (TC) exceeding 950 K and a coercive field (HC) > 4.0 T at 3 K and 8750 Oe at 300 K. Theoretical calculations suggest that ferromagnetism originates from symmetry breaking and undercoordinated Co atoms at the Co2Si and SiO2 interface. With protection by the self-limiting intrinsic oxide, the interfacial ferromagnetism of the Co2Si nanoplates exhibits excellent environmental stability. The controllable growth of ambient stable Co2Si nanoplates as 2D hard ferromagnets could open exciting opportunities for fundamental studies and applications in Si-based spintronic devices.

Palabras clave

environmental stability; hard ferromagnets; perpendicular magnetic anisotropy; room-temperature interfacial ferromagnetism; two-dimensional materials

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2024 Tipo del documento: Article País de afiliación: China