Universality of magnetic susceptibility in the conical state of the kagome ferromagnet Fe3Sn2

IF 3.8 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2026-10-12 DOI:10.1063/5.0342307

Lilian Prodan,Donald M. Evans,Lukas Puntigam,István Kézsmárki,Vladimir Tsurkan

引用次数: 0

Abstract

We report universal behavior of the differential magnetic susceptibility (DMS) in the conical phase that mediates the spin-reorientation (SR) transition of the kagome ferromagnet Fe3Sn2. Within the SR temperature range, the DMS isotherms exhibit extremely narrow crossing regions, forming isosbestic points. Using an isosbestic-invariance analysis, we show that the isotherms collapse onto a single temperature-independent curve, revealing quadratic-in-temperature corrections to the susceptibility. Complementary field-dependent magnetic-force-microscopy measurements uncover the evolution of spin textures from stripe-like domains at low fields to isolated bubble-like domains near the isosbestic field (∼0.6 T), a behavior not previously reported in bulk Fe3Sn2 within the conical state. These findings point to a universal mechanism for the emergence of complex magnetic textures near isosbestic points, driven by the competition between magnetocrystalline anisotropy, dipolar interactions, and external magnetic field.

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铁磁体Fe3Sn2圆锥形磁化率的普遍性

我们报道了在锥形相中微分磁化率（DMS）的普遍行为，该行为介导了kagome铁磁体Fe3Sn2的自旋重定向（SR）转变。在SR温度范围内，DMS等温线呈现极窄的交叉区，形成等吸点。利用等吸不变性分析，我们发现等温线坍缩成一条与温度无关的曲线，揭示了磁化率的二次温度修正。互补场相关的磁力显微镜测量揭示了自旋织体的演化，从低场的条纹状结构域到等吸场附近的孤立气泡状结构域（~ 0.6 T），这一行为在锥形状态下的Fe3Sn2体中以前没有报道过。这些发现指出了在磁晶各向异性、偶极相互作用和外部磁场之间的竞争驱动下，在等同点附近出现复杂磁性结构的普遍机制。

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.