High-throughput approach to search new rare-earth free permanent magnets

The demand for new rare-earth free permanent magnets for high-performance motors and generators is increasing due to the limited availability, high cost, and supply chain risks of rare earth elements. We present a high-throughput search for new rare-earth-free permanent magnets, focusing on materials containing Fe or Mn. Our search targets candidates with high saturation magnetization and coercivity, drawing from Experimental and Computed Database. Using first-principles methods, we filtered candidates based on key properties like saturation magnetization, Curie temperature, and magnetic anisotropy—an effective proxy for coercivity. This computational screening, driven by theory, will be integrated with experimental synthesis and characterization to accelerate the discovery of high-performance, rare-earth-free permanent magnets. Such advancements will play a pivotal role in reducing reliance on fossil fuels and advancing a more sustainable future.