Materials with multifunctionality affect society enormously. However, the inability to surmount multiple functionality trade-offs limits the discovery of next-generation multifunctional materials. Departing from conventional alloying design philosophy, we present a hierarchical nanostructure (HNS) strategy to simultaneously break multiple performance trade-offs in a material. Using a praseodymium-cobalt (PrCo 5 ) ferromagnet as a proof of concept, the resulting HNS outperforms contemporary high-temperature ferromagnets with a 50 to 138% increase in electrical resistivity while achieving their highest energy density. Our strategy also enables an exceptional thermal stability of coercivity (−0.148%/°C)—a key characteristic for device accuracy and reliability—surpassing that of existing commercial rare-earth magnets. The multifunctionality stems from the deliberately introduced nanohierarchical structure, which activates multiple micromechanisms to resist domain wall movement and electron transport, offering an advanced design concept for multifunctional materials.

中文翻译：

---

快速制造分层纳米结构多功能铁磁体


多功能材料对社会产生巨大影响。然而，无法克服多种功能的权衡限制了下一代多功能材料的发现。与传统的合金化设计理念不同，我们提出了一种分层纳米结构（HNS）策略，以同时打破材料中的多种性能权衡。使用镨钴 (PrCo 5 ) 铁磁体作为概念验证，所得 HNS 的电阻率提高了 50% 至 138%，同时实现了最高能量密度，其性能优于当代高温铁磁体。我们的策略还实现了卓越的矫顽力热稳定性 (−0.148%/°C)（器件精度和可靠性的关键特性），超越了现有的商用稀土磁体。多功能性源于刻意引入的纳米层次结构，它激活多种微观机制来抵抗磁畴壁运动和电子传输，为多功能材料提供了先进的设计理念。