Effect of non-ferromagnetic element content on magnetic properties of FeCoMnAlSi high entropy alloy

IF 4.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL Intermetallics Pub Date : 2025-05-01 Epub Date: 2025-02-12 DOI:10.1016/j.intermet.2025.108703

Z.B. Song , T.X. Huang , Aditya Jain , Y.G. Wang

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Abstract

High-entropy alloys have attracted considerable attention due to their advantages such as versatility and customizable properties. The customizable properties in soft magnetic high-entropy alloys mainly come from non-ferromagnetic elements, but it is challenging to maintain good soft magnetic properties while increasing the proportion of non-ferromagnetic elements. In this study, the ratio of non-ferromagnetic elements is systematically adjusted in the FeCoMnAlSi high-entropy alloy to explore its influence on soft magnetic properties. The structure of the alloys transforms in a sequence of FCC + BCC → BCC → BCC + B2 as the proportion of non-ferromagnetic elements increases. The soft magnetic properties of the system are significantly influenced by non-ferromagnetic elements. The dependence of saturation magnetization (M_s) on the proportion of non-ferromagnetic elements exhibits an И-shaped pattern, while that of coercivity (H_c) follows a V-shaped trend. Notably, the alloy (Fe_4/5Co_1/5)₇₈(Mn_10/23Al_10/23Si_3/23)₂₂ exhibits an exceptionally high M_s of 189.12 emu·g⁻¹ and a low H_c of 1.9 Oe. Simulation calculations indicated that the enhancement in M_s results from a reduction in the antiferromagnetic coupling between Fe and Mn, coupled with an improved efficiency of the ferromagnetic transformation in Mn.

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非铁磁性元素含量对FeCoMnAlSi高熵合金磁性能的影响

高熵合金因其多功能性和可定制性等优点而受到广泛关注。软磁高熵合金的可定制性能主要来自于非铁磁元素，但如何在增加非铁磁元素比例的同时保持良好的软磁性能是一个挑战。本研究系统调整FeCoMnAlSi高熵合金中非铁磁性元素的比例，探讨其对软磁性能的影响。随着非铁磁性元素含量的增加，合金的组织转变为FCC + BCC→BCC→BCC + B2。非铁磁性元素对系统的软磁性能有显著影响。饱和磁化强度（Ms）与非铁磁元素比例的关系呈И-shaped型，矫顽力（Hc）的关系呈v型。值得注意的是，合金（Fe4/5Co1/5）78(Mn10/23Al10/23Si3/23)22的Ms异常高，为189.12 emu·g−1，Hc低，为1.9 Oe。模拟计算表明，Ms的增强是由于Fe和Mn之间的反铁磁耦合减少，以及Mn中铁磁转换效率的提高。

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.