Prospect for HRE-free high coercivity Nd-Fe-B permanent magnets
By K. Hono, H. Sepehri‐Amin. Scripta Materialia, 2018
139 citations recorded by the source corpus.
Abstract Recent state-of-the-art microstructure investigations on Nd-Fe-B sintered magnets have revealed that the Nd2Fe14B grains in conventional sintered magnets are exchange-coupled through ferromagnetic grain boundary phase and the coercivity is governed by domain wall pinning, while exchange-decoupled sintered magnets can be processed by tuning the chemical composition to a slightly Nd-rich and B-lean one with Ga-doping. The coercivity of exchange-decoupled magnets is governed by the nucleation mechanism, giving rise to higher coercivity. Based on recent studies on microstructure-coercivity relationships of various Nd-Fe-B magnets, prospect of HRE-free high coercivity and high remanence magnets is discussed.
Subfields: Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/2b30c130b513503a51f143966dc20fca09487a00
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In Atomic and Molecular Physics, and Optics
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- Perspective and Prospects for Rare Earth Permanent Magnets (2020, methodology): “The literature value of the anisotropy constant K1 is based on measurements in a large transverse field or else in a pulsed field, in order to determine the singular point in the time derivative of the magnetization at 14 T [4,33,50].”