Anomalous Hall effect in a near room-temperature soft ferromagnet <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi>AlFe</mi><mn>2</mn></msub><msub><mi mathvariant="normal">B</mi><mn>2</mn></msub></mrow></math>

Xinxuan Lin; Yuansheng Bu; Jiawei Li; Shuyue Guan; Hongming Weng; Shuang Jia

doi:10.1103/qvqx-lqgz

Anomalous Hall effect in a near room-temperature soft ferromagnet ${AlFe}_{2} B_{2}$

Xinxuan Lin ^1,*, Yuansheng Bu^2,3,*, Jiawei Li¹, Shuyue Guan ¹, Hongming Weng^2,3,†, and Shuang Jia ^1,4,5,‡

¹International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
²Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
³University of Chinese Academy of Sciences, Beijing 100049, China
⁴Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials, Peking University, Beijing 100871, China
⁵Hefei National Laboratory, Hefei 230088, China

^*These authors contribute equally to this work.
^†Contact author: hmweng@iphy.ac.cn
^‡Contact author: gwljiashuang@pku.edu.cn

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Phys. Rev. Materials 10, 034406 – Published 6 March, 2026

DOI: https://doi.org/10.1103/qvqx-lqgz

Abstract

We report the anisotropic magnetization and the anomalous Hall effect (AHE) in single-crystalline ${AlFe}_{2} B_{2}$ , which undergoes a ferromagnetic (FM) transition at 275 K. The intrinsic mechanism is essential for the AHE in the FM state, resulting in a significant anomalous Hall conductivity of over 200 $Ω^{- 1} {cm}^{- 1}$ at low temperatures. Due to its moderate susceptibility as a soft magnet, this material exhibits a high resistivity sensitivity across a wide temperature range, suggesting its potential as an anomalous Hall sensor for detecting weak magnetic fields.

Physical Review Materials

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Anomalous Hall effect in a near room-temperature soft ferromagnet ${AlFe}_{2} B_{2}$

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Anomalous Hall effect in a near room-temperature soft ferromagnet AlFe2B2

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Anomalous Hall effect in a near room-temperature soft ferromagnet ${AlFe}_{2} B_{2}$