ABSTRACT

To realize a sustainable society, ‘green technology’ with low (or even zero) CO₂ emissions is required. A key material in such technology is a permanent magnet because it is utilized for electric-power conversion in several applications including electric vehicles (EVs), hybrid EVs (HEVs), and turbines for wind power generation. To realize highly efficient electric-power conversion, a stronger permanent magnet than Nd–Fe–B is necessary. One potential candidate is a Fe-rich SmFe₁₂-based compound with a ThMn₁₂ structure. In this paper, the phase stability, structure, and intrinsic and extrinsic magnetic properties in both film and bulk forms are reviewed. Based on these results, a possible way to realize a strong SmFe₁₂-based permanent magnet in bulk form is discussed.

摘要

为了实现可持续发展的社会，需要低（甚至零）CO ₂排放的“绿色技术” 。这种技术的关键材料是永磁体，因为它被用于多种应用中的电力转换，包括电动汽车 (EV)、混合动力电动汽车 (HEV) 和风力发电涡轮机。为了实现高效的电力转换，需要比 Nd-Fe-B 更强的永磁体。一个潜在的候选者是富Fe以SmFe ₁₂具有ThMn类化合物₁₂的结构。在本文中，综述了薄膜和块体形式的相稳定性、结构以及内在和外在磁性。基于这些结果，实现强 SmFe ₁₂的可能方法讨论了大块形式的 基永磁体。