Fast fabrication of a hierarchical nanostructured multifunctional ferromagnet

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) s...

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Published in:Science (American Association for the Advancement of Science) 2024-08, Vol.385 (6709), p.634-641
Main Authors: Hua, Yingxin, Li, Xiaohong, Li, Jiaxu, Luo, Xiang, Li, Yuqing, Qin, Wenyue, Zhang, Liqiang, Xiao, Jianwei, Xia, Weixing, Song, Ping, Yue, Ming, Zhang, Hai-Tian, Zhang, Xiangyi
Format: Article
Language:English
Subjects:
Cobalt
Eddy currents
Electrical resistivity
Fabrication
Ferromagnetism
Grain size
Induction heating
Magnetic domains
Magnetic properties
Magnetic saturation
Magnets
Praseodymium
Stacking faults
Temperature requirements
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container_title Science (American Association for the Advancement of Science)
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creator Hua, Yingxin
Li, Xiaohong
Li, Jiaxu
Luo, Xiang
Li, Yuqing
Qin, Wenyue
Zhang, Liqiang
Xiao, Jianwei
Xia, Weixing
Song, Ping
Yue, Ming
Zhang, Hai-Tian
Zhang, Xiangyi
description 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 ) 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.
doi_str_mv 10.1126/science.adp2328
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source Science Magazine; Alma/SFX Local Collection
subjects Cobalt
Eddy currents
Electrical resistivity
Fabrication
Ferromagnetism
Grain size
Induction heating
Magnetic domains
Magnetic properties
Magnetic saturation
Magnets
Praseodymium
Stacking faults
Temperature requirements
title Fast fabrication of a hierarchical nanostructured multifunctional ferromagnet
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