Large Anomalous Hall Effect in a Noncoplanar Magnetic Heterostructure

Anke Song; Jine Zhang; Yequan Chen; Zhizhong Zhang; Xinjuan Cheng; Ruijie Xu; Wenzhuo Zhuang; Wenxuan Sun; Yong Zhang; Xu Zhang; Zhongqiang Chen; Fengqi Song; Yue Zhang; Xuechao Zhai; Yongbing Xu; Weisheng Zhao; Rong Zhang; Xuefeng Wang

arXiv · 2501.07019

Large Anomalous Hall Effect in a Noncoplanar Magnetic Heterostructure

Anke Song·Jine Zhang·Yequan Chen·Zhizhong Zhang·Xinjuan Cheng·Ruijie Xu·Wenzhuo Zhuang·Wenxuan Sun·Yong Zhang·Xu Zhang·Zhongqiang Chen·Fengqi Song·Yue Zhang·Xuechao Zhai·Yongbing Xu·Weisheng Zhao·Rong Zhang·Xuefeng Wang

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Abstract

The anomalous Hall effect (AHE) occurs in magnetic systems and also unexpectedly in non-magnetic materials adjacent to magnetic insulators via the heterointerface interactions. However, the AHE in heterostructures induced by magnetic proximity effect remains quite weak, restricting their practical device applications. Here, we report a large intrinsic AHE with a resistivity of 114 n{\Omega} cm at 5 K in noncoplanar magnetic heterostructures of Cr5Te6/Pt. This is the record-high AHE value among all the magnetic insulators/heavy metal heterostructures. A reversal of the AHE signal occurs due to the reconstruction of Berry curvature at the Fermi level, which is verified by the first-principles calculations. Topological spin textures at the interface are directly visualized via high-magnetic-field magnetic force microscopy, which accounts for the large AHE, as confirmed by the atomic simulations. These findings open a new avenue for exploring the large AHE in heterointerfaces and facilitate the potential applications in topological spintronic devices.

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Anke Song, Jine Zhang, Yequan Chen, Zhizhong Zhang, Xinjuan Cheng, Ruijie Xu, Wenzhuo Zhuang, Wenxuan Sun, Yong Zhang, Xu Zhang, Zhongqiang Chen, Fengqi Song, Yue Zhang, Xuechao Zhai, Yongbing Xu, Weisheng Zhao, Rong Zhang, Xuefeng Wang. 2025-01-13. Large Anomalous Hall Effect in a Noncoplanar Magnetic Heterostructure. https://arxiv.org/abs/2501.07019

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