Erbium: key to simultaneously achieving superior temperature-stability and high magnetic properties in 2 : 17-type permanent magnets.

IF 12.2 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Materials Horizons Pub Date : 2025-01-23 DOI:10.1039/d4mh01765j

Zan Long, Chaoyue Zhang, Yuqing Li, Baoguo Zhang, Mengying Bian, Chong Ling, Youning Kang, Hongguo Zhang, Qiong Wu, Ming Yue

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引用次数: 0

Abstract

To address the demands of rapidly advancing precision instruments requiring higher efficiency and miniaturization, permanent magnets must exhibit exceptional energy density, temperature stability, high magnetic energy product [(BH)_max], and adequate coercivity (H_cj). Herein, we design rare earth Er-based magnets (2 : 17-type Er-magnets) with a composition of (Er, Sm)(Co, Fe, Cu, Zr)_7.6. Erbium-based compounds (Er₂Co₁₇) offer a unique combination of temperature compensation and high saturation magnetization compared to other heavy rare earth elements, resulting in 2 : 17-type Er-magnets with superior temperature stability in B_r and (BH)_max. Partially substituting Sm reduces the energy barrier for the 2 : 17H-to-2 : 17R phase transition, promoting the development of a complete cellular structure and achieving enhanced coercivity. Notably, the optimal performance is obtained with Er constituting 60% of the total rare earth content, delivering a near-zero temperature-coefficient for B_r and (BH)_max within 20-150 °C while maintaining B_r at 8.92 kG, H_cj at 29.83 kOe, and (BH)_max at 18.5 MGOe. These 2 : 17-type Er-magnets provide valuable insights for developing permanent magnets with exceptional comprehensive properties.

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来源期刊

Materials Horizons CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

18.90

自引率

2.30%

发文量

306

审稿时长

1.3 months

期刊介绍： Materials Horizons is a leading journal in materials science that focuses on publishing exceptionally high-quality and innovative research. The journal prioritizes original research that introduces new concepts or ways of thinking, rather than solely reporting technological advancements. However, groundbreaking articles featuring record-breaking material performance may also be published. To be considered for publication, the work must be of significant interest to our community-spanning readership. Starting from 2021, all articles published in Materials Horizons will be indexed in MEDLINE©. The journal publishes various types of articles, including Communications, Reviews, Opinion pieces, Focus articles, and Comments. It serves as a core journal for researchers from academia, government, and industry across all areas of materials research. Materials Horizons is a Transformative Journal and compliant with Plan S. It has an impact factor of 13.3 and is indexed in MEDLINE.