Rotating magnetocaloric effect in sintered La(Fe,Mn,Si)13H z plates

IF 3.8 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2026-08-31 DOI:10.1063/5.0339017

Rafael Almeida,Tomás Ventura,Ricardo Moura Costa Pinto,João Oliveira Silva,Konrad Loewe,Rodrigo Kiefe,João Sequeira Amaral,João Pedro Araújo,João Horta Belo

引用次数: 0

Abstract

This work characterizes the conventional and rotating magnetocaloric effect (RMCE) present in a 0.27 mm-thin plate of hydrogenated La(Fe,Mn,Si). The high aspect ratio (∼50) of the thin plate leads to an anisotropic magnetocaloric effect (MCE), dependent on the relative orientation of the external magnetic field, and an RMCE when the external field is rotated. We find a maximum rotating adiabatic temperature change (ΔTadrot) of 1.17 K upon rotation of a 1 T magnetic field, and 1.12 K with 0.6 T—a reduction of only 4% for a 40% reduction in field strength. Magnetostatic computations revealed a considerable rotating entropy change (ΔSisorot), comparable to the MCE of Gd for similar fields, reaching 3.97 J K−1 kg−1 for 1 T and 3.68 J K−1 kg−1 for 0.6 T (7% reduction), highlighting La-Fe-Mn-Si alloys as high potential candidates for a magnetic refrigerator based on the RMCE utilizing low magnetic fields.

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烧结La(Fe,Mn,Si)13H - z板的旋转磁热效应

这项工作表征了传统的和旋转的磁热效应（RMCE）存在于0.27毫米厚的氢化La（Fe,Mn,Si）板上。薄板的高纵横比（~ 50）导致各向异性磁热效应（MCE），这取决于外部磁场的相对方向，以及外部磁场旋转时的RMCE。我们发现，在1 T磁场旋转时，最大旋转绝热温度变化（ΔTadrot）为1.17 K，而在0.6 T磁场旋转时，最大旋转绝热温度变化为1.12 K，磁场强度降低40%，但仅降低4%。静磁计算显示了相当大的旋转熵变（ΔSisorot），与Gd在类似磁场下的MCE相当，在1 T时达到3.97 J K−1 kg−1，在0.6 T时达到3.68 J K−1 kg−1（减少7%），突出了La-Fe-Mn-Si合金是基于低磁场RMCE的磁性冰箱的高潜力候选材料。

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.