Optimizing the microstructure and magnetic properties of SmFe12-based bulk magnets by tuning the V-substitution

IF 2.5 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials Pub Date : 2025-05-11 DOI:10.1016/j.jmmm.2025.173177

Xing Zheng , Tian Hong Zhou , Baochao Zhang , Youngwoon Song , Ping-Zhan Si , Chul-Jin Choi , Beom-Kyeong Park , Jihoon Park

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引用次数: 0

Abstract

The SmFe₁₂-based magnets came into recent research focus for its high intrinsic magnetic properties and low cost in raw materials. To achieve high coercivity, the microstructure of the SmFe₁₂₋_xV_x (1.3 ≤ x ≤ 2) alloys were optimized by controlling the V-substitution to Fe in the samples. We found that when x in SmFe₁₂₋_xV_x is 1.8 or higher, the meta-stable ThMn₁₂ phase can be effectively stabilized in the Sm-Fe-V ternary alloys. The coercivity of SmFe₁₂₋_xV_x alloys increases with increasing x. A coercivity up to 772 kA/m was achieved in SmFe₁₀V₂ alloys. The Curie temperature of SmFe₁₂₋_xV_x decreases from 637 K (x = 1.3) to 570 K (x = 2) with increasing V concentration, owing to reduced Fe-Fe interactions. The effects of V content and processing parameters on the microstructure of Sm-Fe-V alloys unveiled in this work provide insight into the optimization of the magnetic performance of SmFe₁₂-based magnets.

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通过调整v -取代来优化smfe12基块体磁体的微观结构和磁性能

smfe12基磁体以其高固有磁性能和低原料成本成为近年来的研究热点。为了获得高矫顽力，通过控制样品中v - Fe的取代，优化SmFe12−xVx（1.3≤x≤2）合金的微观结构。我们发现，当SmFe12−xVx中的x为1.8或更高时，亚稳定ThMn12相可以有效地稳定在Sm-Fe-V三元合金中。SmFe12−xVx合金的矫顽力随x的增大而增大，SmFe10V2合金的矫顽力可达772 kA/m。随着V浓度的增加，SmFe12−xVx的居里温度从637 K （x = 1.3）降低到570 K (x = 2)，这是由于Fe-Fe相互作用的减弱。本文揭示的V含量和工艺参数对Sm-Fe-V合金微观组织的影响，为smfe12基磁体磁性能的优化提供了新的思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Magnetism and Magnetic Materials 物理-材料科学：综合

CiteScore

5.30

自引率

11.10%

发文量

1149

审稿时长

59 days

期刊介绍： The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public. Main Categories: Full-length articles: Technically original research documents that report results of value to the communities that comprise the journal audience. The link between chemical, structural and microstructural properties on the one hand and magnetic properties on the other hand are encouraged. In addition to general topics covering all areas of magnetism and magnetic materials, the full-length articles also include three sub-sections, focusing on Nanomagnetism, Spintronics and Applications. The sub-section on Nanomagnetism contains articles on magnetic nanoparticles, nanowires, thin films, 2D materials and other nanoscale magnetic materials and their applications. The sub-section on Spintronics contains articles on magnetoresistance, magnetoimpedance, magneto-optical phenomena, Micro-Electro-Mechanical Systems (MEMS), and other topics related to spin current control and magneto-transport phenomena. The sub-section on Applications display papers that focus on applications of magnetic materials. The applications need to show a connection to magnetism. Review articles: Review articles organize, clarify, and summarize existing major works in the areas covered by the Journal and provide comprehensive citations to the full spectrum of relevant literature.