Rare-earth-free magnetically hard ferrous materials.

Area of Science:

• Materials Science
• Condensed Matter Physics
• Magnetism

Background:

• Permanent magnets, particularly rare-earth based ones, are crucial for energy and information technologies.
• Environmental concerns and supply chain vulnerabilities of rare-earth elements necessitate alternatives.
• Developing rare-earth-free magnets with high energy product (BH)max is a key research objective.

Purpose of the Study:

• To review the progress and potential of iron-based permanent magnets as a rare-earth-free alternative.
• To summarize synthesis methods and magnetic properties of iron-based permanent magnets.
• To highlight iron-based magnets as promising candidates for future magnetic applications.

Main Methods:

• Literature review of iron-based permanent magnet research.
• Analysis of materials synthesis techniques for iron-based magnets.
• Evaluation of magnetic properties, including energy product (BH)max.

Main Results:

• Iron-based permanent magnets are identified as a viable rare-earth-free option.
• Their abundance and magnetic performance make them attractive.
• Ongoing research focuses on optimizing their properties through advanced synthesis.

Conclusions:

• Iron-based permanent magnets offer a sustainable and high-performance solution.
• Continued research in synthesis and property optimization is essential.
• These magnets are poised to play a significant role in future energy-critical technologies.