About this Research Topic
Magnetic materials, especially permanent magnetic materials and soft magnetic materials are the foundation of industrial technology. The key performance parameters of the permanent magnets and the energy products, improved exponentially over much of the 20th century, doubling roughly every 12 years. However, it has not improved significantly in the last 30 years. With the rapid development of 5G communication, wireless charging, and new energy vehicles, soft magnetic materials are developing in the direction of high frequency, high permeability, high power density, and low core loss, while both ferrite and soft magnetic alloy cannot meet the above requirements. Therefore, it is urgent to find new materials, new structures of traditional materials, and new preparation technology with potential value.
The main limits on energy products are the saturation magnetization and coercivity. The greatest magnetization to be found in a thin film magnet at room temperature is in the newly found Fe16N2 rare-earth free magnet phase, which has M=2.26 MA m−-1, much higher than the traditional highest Fe-Co alloy. Also, it is considered to be possible to achieve an energy product in excess of a megajoule per cubic meter in an optimized hard/soft nanocomposite. The pearl-like bionic structure in the soft magnetic composite is considered to have better magnetic circuit and soft magnetic properties than the traditional isotropic structure. Moreover, emerging technologies, such as 3D printing, provide more possibilities for material design and preparation.
This Research Topic aims to investigate emerging magnetic materials, new structure, and novel preparation technology beyond tradition for various applications. Subjects of interest include:
- Theory calculation, synthesis, and characterization of emerging magnetic materials, including but not limited to rare-earth free alloy, transitional metal alloy, ferrite materials, and magnetic composite;
- Emerging magnetic materials with novel morphologies or structures, particularly the new structure of traditional materials;
- Theoretical and experimental understanding of the relationship of novel structure and performance;
- Novel designs and preparation technology for magnetic materials;
- The potential application of magnetic materials, including but not limited to spintronics, sensors, chemical magnetism, and biomedical applications.
Keywords: magnetic materials, new structure, preparation
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