Optimize magnetocaloric properties and preparation efficiency of off-stoichiometric La1.1-xCexFe11.7-yMnySi1.3 hydrides through systematic investigation of the 1:13 phase formation mechanism

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

Journal of Magnetism and Magnetic Materials Pub Date : 2024-11-29 DOI:10.1016/j.jmmm.2024.172696

Yibo Jin , Jun Wang , Hongchao Li , Tong Wei , Chao Li , Jinshan Li

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引用次数: 0

Abstract

The fully hydrogenated La_1.1-xCe_xFe_11.7-yMn_ySi_1.3 magnetocaloric materials have high magnetic entropy changes while maintaining low hysteresis loss. To significantly improve the magnetocaloric properties and preparation efficiency, the 1:13 phase transition mechanism of off-stoichiometric La_1.1-xCe_xFe_11.7-yMn_ySi_1.3 ((x,y)=(0.24, 0.16), (0.34, 0.14), (0.44, 0.10)) was studied in detail. The optimal annealing temperature increased with increasing Ce(x), and the La_0.86Ce_0.44Fe_11.4Mn_0.1Si_1.3 sample annealed at 1423 K for 18 h reached 80 vol% of the 1:13 phase, which was significantly greater than that of the sample annealed at 1373 K for 7 days (69 %). After hydrogenation, the relative cooling power of La_0.86Ce_0.44Fe_11.4Mn_0.1Si_1.3 annealed at 1423 K for 18 h increased by 40 % (−ΔS_M = 8.0 J/kgK, δ_FWHM = 12.5 K) compared with that of the sample annealed at 1373 K for 7 days. The substitution of Ce atoms was found to promote the formation of the 1:13 phase. This work not only conducted an in-depth study on the annealing mechanism of Ce and Mn multielement-substituted La-Fe-Si compounds but also greatly reduced the difficulty of preparing La-Fe-Si materials with high Ce contents, which accelerated the engineering application of this type of material.

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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.