Tuning magnetocaloric effect by carbon interstitial phase in RE15Si9Cx (RE = Er, Ho) compounds for hydrogen liquefaction

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-07-21 DOI:10.1063/5.0281852

Lu Tian, Haobo Sun, Jianjian Gong, Zhenxing Li, Guodong Liu, Jun Shen, Zhaojun Mo

引用次数: 0

Abstract

The manipulation of the magnetocaloric effect in rare-earth-based compounds through interstitial doping has attracted extensive research interest. While interstitials are known to regulate magnetic transition temperatures, their role in enhancing the magnetocaloric effect remains scarcely reported. Here, we demonstrate that interstitial carbon in RE15Si9Cx (RE = Er, Ho; x = 1, 2) compounds drives a transition from antiferromagnetic to ferromagnetic states, accompanied by a significant enhancement of the magnetocaloric effect. This improvement positions these compounds as promising candidates for hydrogen liquefaction applications. Theoretical calculations reveal that the interstitial carbon modifies both the exchange interactions and crystal field effects between adjacent magnetic ions, thereby inducing the observed magnetic transitions.

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利用碳间隙相调节RE15Si9Cx （RE = Er, Ho）化合物的磁热效应用于氢液化

通过间隙掺杂来控制稀土基化合物中的磁热效应已经引起了广泛的研究兴趣。虽然已知间隙可以调节磁转变温度，但它们在增强磁热效应方面的作用仍然很少报道。在这里，我们证明了RE15Si9Cx (RE = Er, Ho；X = 1,2)化合物驱动从反铁磁态到铁磁态的转变，伴随着磁热效应的显著增强。这一改进使这些化合物成为氢液化应用的有希望的候选者。理论计算表明，间隙碳改变了相邻磁性离子之间的交换作用和晶体场效应，从而诱发了所观察到的磁跃迁。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.