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Volume 19
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10.3390/ma19030561
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Effect of Gd Alloying on Magnetic Properties of Direct-Quenched Fe-Gd-B Nanocrystalline Alloys

by
Linli Wang
1,
Yuanyuan Wang
2,
Zhongao Wang
1,
Ming Nie
1,
Feng Huang
1,
Wangyan Lv
1,
Huameng Fu
2,
Haifeng Zhang
2 and
Zhengwang Zhu
2,*
1
Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou 510080, China
2
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
*
Author to whom correspondence should be addressed.
Materials 2026, 19(3), 561; https://doi.org/10.3390/ma19030561
Submission received: 27 December 2025 / Revised: 16 January 2026 / Accepted: 28 January 2026 / Published: 30 January 2026
(This article belongs to the Special Issue Physical Metallurgy of Metals and Alloys (4th Edition))
Versions Notes

Abstract

Nanocrystalline Fe-Gd-B alloys were successfully synthesized via Gd alloying in a binary Fe-B system using a single-roller melt-spinning technique. A systematic investigation of Gd content variation (0–4.35 at.%) reveals its critical role in tuning microstructure evolution, thermal stability, and magnetic properties. Crucially, the Fe90.70Gd2.32B6.98 alloy ribbon exhibits optimized magnetic performance, achieving a high saturation magnetic induction (Bs) of 1.67 T and a low coercivity (Hc) of 2.737 kA/m. This enhancement is attributed to the suppression α-Fe grain growth through Gd-induced elevation of the thermal stability of the amorphous matrix, which confines the average crystallite size to 26.3 nm. The refined α-Fe phase contributes to elevated Bs through an increased ferromagnetic fraction, while its nanoscale grain structure, combined with wide magnetic domain configurations, effectively reduces Hc by limiting domain wall pinning sites. These findings establish that the synergistic effect of Gd alloying and Fe/B ratio adjustment is a viable strategy for designing high-performance Fe-based magnetic alloys.
Keywords: Fe-Gd-B alloys; nanocrystalline materials; magnetic properties; microstructure; domain wall pinning Fe-Gd-B alloys; nanocrystalline materials; magnetic properties; microstructure; domain wall pinning

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MDPI and ACS Style

Wang, L.; Wang, Y.; Wang, Z.; Nie, M.; Huang, F.; Lv, W.; Fu, H.; Zhang, H.; Zhu, Z. Effect of Gd Alloying on Magnetic Properties of Direct-Quenched Fe-Gd-B Nanocrystalline Alloys. Materials 2026, 19, 561. https://doi.org/10.3390/ma19030561

AMA Style

Wang L, Wang Y, Wang Z, Nie M, Huang F, Lv W, Fu H, Zhang H, Zhu Z. Effect of Gd Alloying on Magnetic Properties of Direct-Quenched Fe-Gd-B Nanocrystalline Alloys. Materials. 2026; 19(3):561. https://doi.org/10.3390/ma19030561

Chicago/Turabian Style

Wang, Linli, Yuanyuan Wang, Zhongao Wang, Ming Nie, Feng Huang, Wangyan Lv, Huameng Fu, Haifeng Zhang, and Zhengwang Zhu. 2026. "Effect of Gd Alloying on Magnetic Properties of Direct-Quenched Fe-Gd-B Nanocrystalline Alloys" Materials 19, no. 3: 561. https://doi.org/10.3390/ma19030561

APA Style

Wang, L., Wang, Y., Wang, Z., Nie, M., Huang, F., Lv, W., Fu, H., Zhang, H., & Zhu, Z. (2026). Effect of Gd Alloying on Magnetic Properties of Direct-Quenched Fe-Gd-B Nanocrystalline Alloys. Materials, 19(3), 561. https://doi.org/10.3390/ma19030561

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