Observation of Colossal Topological Hall Effect in Noncoplanar Ferromagnet Cr5Te6 Thin Films
Source abstract
Abstract
Abstract The topological Hall effect (THE) is critical to the exploration of the spin chirality generated by the real‐space Berry curvature, which has attracted worldwide attention for its prospective applications in spintronic devices. However, the prominent THE remains elusive at room temperature, which severely restricts the practical integration of chiral spin textures. Here, a colossal intrinsic THE is showed up to ≈1.6 µΩ cm in large‐area ferromagnet Cr5Te6 thin films epitaxially grown by pulsed laser deposition. Such a THE can be maintained until 270 K, which is attributed to the field‐stimulated noncoplanar spin textures induced by the interaction of the in‐plane ferromagnet and antiferromagnet infrastructures. The first‐principles calculations further verify the considerable Dzyaloshinskii‐Moriya interaction in Cr5Te6. This work not only paves the way for robust chiral spin textures near room temperature in large‐area low‐dimensional ferromagnetic films for practical applications, but also facilitates the development of high‐density and dissipationless spintronic devices.
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Research context
OpenAlex topics: Magnetic properties of thin films · Topological Materials and Phenomena · Multiferroics and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials School of Electronic Science and Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China
National Laboratory of Solid State Microstructures School of Physics Nanjing University Nanjing 210093 China
Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China
Information Materials and Intelligent Sensing Laboratory of Anhui Province Institutes of Physical Science and Information Technology Anhui University Hefei 230601 China
School of Science Nanjing University of Posts and Telecommunications Nanjing 210023 China
National Laboratory of Solid State Microstructures Department of Materials Science and Engineering Nanjing University Nanjing 210093 China
Department of Physics Xiamen University Xiamen 316005 China
Funding
National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities
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