通过在 HoCo0.8Fe0.2C 化合物中掺铁诱导铁磁转变增强低磁场磁致效应

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

Journal of Magnetism and Magnetic Materials Pub Date : 2024-11-01 DOI:10.1016/j.jmmm.2024.172632

Zhihong Hao , Xiaojuan Wang , Yao Liu , Taosheng Zhong , Lina Zhang , Changwang Yuan , Licheng Xiao , Hui Liu , Juguo Zhang

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引用次数: 0

摘要

由于高性能磁致冷材料在磁制冷技术中的潜在应用，它们的开发备受关注。元素掺杂已成为增强这些材料磁致性的重要策略。在本研究中，我们介绍了通过掺杂铁元素增强 HoCo0.8Fe0.2C 化合物的磁致效应。铁的掺杂不仅诱导了铁磁转变，还显著提高了化合物的磁致性能。在 0 到 7 T 的磁场变化下，HoCo0.8Fe0.2C 化合物的最大磁熵变（-ΔSMmax）为 20.5 J/kg K，制冷剂容量（RC）为 573.3 J/kg。此外，这种化合物在 11 K 时发生了自旋重新定向转变，在 18 K 时发生了从铁磁性到顺磁性的转变。研究结果凸显了掺铁 HoCo0.8Fe0.2C 作为高效磁致变材料的潜力，有助于推动低温磁制冷技术的发展。我们的研究强调了元素掺杂对金属间化合物磁性和磁致性的影响。

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Enhanced low field magnetocaloric effect through Fe doping induced ferromagnetic transition in HoCo0.8Fe0.2C compound

The development of high-performance magnetocaloric materials has garnered significant attention due to their potential applications in magnetic refrigeration technology. Element doping has emerged as a crucial strategy for enhancing the magnetocaloric properties of these materials. In this study, we present the enhanced magnetocaloric effect in the HoCo_0.8Fe_0.2C compound through Fe doping. The Fe doping not only induces a ferromagnetic transition but also significantly improves the magnetocaloric performance of the compound. Under a magnetic field change from 0 to 7 T, the HoCo_0.8Fe_0.2C compound exhibits a maximum magnetic entropy change (

{- Δ S}_{M}^{\max}

) of 20.5 J/kg K and a refrigerant capacity (RC) of 573.3 J/kg. Additionally, this compound undergoes a spin reorientation transition at 11 K and a ferromagnetic to paramagnetic transition at 18 K. These transitions are critical to understanding the magnetocaloric behavior of the material. The results highlight the potential of Fe-doped HoCo_0.8Fe_0.2C as an efficient magnetocaloric material, contributing to the advancement of magnetic refrigeration technology at low temperatures. Our study underscores the impact of element doping on the magnetic and magnetocaloric properties of intermetallic compounds.

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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.