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Li X, Zhou J, Shen L, Sun B, Bai H, Wang W. Exceptionally High Saturation Magnetic Flux Density and Ultralow Coercivity via an Amorphous-Nanocrystalline Transitional Microstructure in an FeCo-Based Alloy. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022:e2205863. [PMID: 36037072 DOI: 10.1002/adma.202205863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 08/24/2022] [Indexed: 06/15/2023]
Abstract
High saturation magnetic flux density (Bs ) of soft magnetic materials is essential for increasing the power density of modern magnetic devices and motor machines. Yet, increasing Bs is always at the expense of high coercivity (Hc ), presenting a general trade-off in the soft magnetic material family. Here, superior comprehensive soft magnetic properties, i.e., an exceptionally high Bs of up to 1.94 T and Hc as low as 4.3 A m-1 are unprecedentedly combined in an FeCo-based alloy. This alloy is obtained through a composition design strategy to construct a transitional microstructure between amorphous and traditional nanocrystalline alloys, with nanocrystals (with < 5 nm-sized crystal-like regions around) sparsely dispersed in an amorphous matrix. Such transitional microstructure possesses extremely low magnetic anisotropy caused by the annihilation of quasi-dislocation dipoles, and a strong magnetic exchange interaction, which leads to excellent comprehensive magnetic properties. The results provide useful guidelines for the development of the next generation of soft magnetic materials, which are promising for applications of high-frequency, high-efficiency, and energy-saving devices.
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Affiliation(s)
- Xuesong Li
- Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- Songshan Lake Materials Laboratory, Dongguan, 523808, China
- School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing, 102206, China
| | - Jing Zhou
- Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- Songshan Lake Materials Laboratory, Dongguan, 523808, China
- School of Mechanical Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Laiquan Shen
- Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Baoan Sun
- Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- Songshan Lake Materials Laboratory, Dongguan, 523808, China
| | - Haiyang Bai
- Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- Songshan Lake Materials Laboratory, Dongguan, 523808, China
| | - Weihua Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- Songshan Lake Materials Laboratory, Dongguan, 523808, China
- School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing, 102206, China
- School of Mechanical Engineering, Dongguan University of Technology, Dongguan, 523808, China
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Hassdorf R, Arend M, Felsch W. Crystal-to-glass-transition induced elastic anomaly of cerium-iron multilayer films and texture-related mechanical properties after hydrogenation. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:8715-8722. [PMID: 9977505 DOI: 10.1103/physrevb.51.8715] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kakehashi Y, Yu M. Theory of amorphous metallic magnetism with self-consistent amplitude fluctuations and its application to amorphous Fe. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:6189-6198. [PMID: 9976993 DOI: 10.1103/physrevb.50.6189] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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