Magnetotransport Properties of La(Fe1-xSix)13 Compounds

IF 1.6 4区物理与天体物理 Q3 PHYSICS, APPLIED

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-02-25 DOI:10.1007/s10948-025-06941-8

Kosuke Tanabe, Yuji Ueno, Hirofumi Wada

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Abstract

Ternary La(Fe_1-xSi_x)₁₃ compounds undergo a first-order magnetic transition at the Curie temperature T_C. Above T_C, the compounds exhibit the itinerant electron metamagnetism. We have studied Hall effect and thermal conductivity of La(Fe_1-xSi_x)₁₃. The Hall resistivity was measured as a function of the magnetic field B at various temperatures. Using the magnetization data, we separated the normal Hall effect (NHE) and the anomalous Hall effect (AHE) in the ferromagnetic state. It is found that NHE is positive at low temperatures, while it becomes negative near T_C. The large AHE was observed for x = 0.12. Our analyses revealed that the skew scattering is dominant in the AHE. The temperature dependence of thermal conductivity λ exhibits a peak at T_C for x = 0.12 and 0.14, while abrupt reduction in λ was observed at T_C for x = 0.10 both on cooling and on heating. We discuss the physical origins of these anomalies in the transport properties of La(Fe_1-xSi_x)₁₃.

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La(fe1 - x6)13化合物的磁输运性质

三元La(fe1 - x6)13化合物在居里温度下发生一级磁跃迁。在TC以上，化合物表现出流动的电子变磁性。研究了La(Fe1-xSix)13的霍尔效应和导热系数。在不同温度下测量了霍尔电阻率作为磁场B的函数。利用磁化数据，我们分离了铁磁状态下的正常霍尔效应（NHE）和异常霍尔效应（AHE）。发现NHE在低温时为正，在接近高温时变为负。在x = 0.12时观察到较大的AHE。我们的分析表明，斜散射在AHE中占主导地位。当x = 0.12和0.14时，热导率λ的温度依赖性在TC处达到峰值，而当x = 0.10时，热导率λ在冷却和加热时均急剧下降。我们讨论了La(Fe1-xSix)13输运性质中这些异常的物理根源。

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

Journal of Superconductivity and Novel Magnetism 物理-物理：凝聚态物理

CiteScore

3.70

自引率

11.10%

发文量

342

审稿时长

3.5 months

期刊介绍： The Journal of Superconductivity and Novel Magnetism serves as the international forum for the most current research and ideas in these fields. This highly acclaimed journal publishes peer-reviewed original papers, conference proceedings and invited review articles that examine all aspects of the science and technology of superconductivity, including new materials, new mechanisms, basic and technological properties, new phenomena, and small- and large-scale applications. Novel magnetism, which is expanding rapidly, is also featured in the journal. The journal focuses on such areas as spintronics, magnetic semiconductors, properties of magnetic multilayers, magnetoresistive materials and structures, magnetic oxides, etc. Novel superconducting and magnetic materials are complex compounds, and the journal publishes articles related to all aspects their study, such as sample preparation, spectroscopy and transport properties as well as various applications.