journal article·2024-03

Surface‐Sensitive Detection of Magnetic Phase Transition in Van Der Waals Magnet CrSBr

Fangfang Pei, Jingjing Yu, Jiayuan Zhou, Siyu Wang, Daxiang Liu, Yanan Yuan, Lei Xi, Feng Jin, Xucai Kan, Chao Wang, Lingfei Wang, Wensheng Yan, Yizheng Wu, Shouguo Wang, Kai Chen, Tianping Ma, Xue Liu, Mengmeng Yang, Qian Li

Advanced Functional Materials· Volume 34· Issue 12
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Abstract

Abstract 2D magnets have recently drawn enormous interest. As an air‐stable A‐type van der Waals antiferromagnet (AFM), CrSBr has attracted great attention but has also led to controversies about its large‐span ordering temperatures. Herein, a systematic study of the magnetic phase transition in single‐crystalline CrSBr with ultrahigh‐quality through surface‐sensitive X‐ray magnetic linear dichroism and X‐ray magnetic circular dichroism measurements combined with vibrating sample magnetometry for characterization of bulk magnetization is reported. The interlayer AFM order of both surface and bulk CrSBr is revealed to maintain a similar Néel temperature within the range of 132–142 K. However, the intralayer ferromagnetic (FM) order of surface CrSBr is found to sustain up to ≈238 K, 70 K higher than the value obtained from the bulk CrSBr, demonstrating a dramatically different surface and bulk Curie temperature in CrSBr. Moreover, a half‐filled t2g electronic state for Cr3+ ions with magnetic moment of ≈3 µB/Cr in CrSBr is clearly identified. These results enrich the understanding of the electronic structure and magnetism in CrSBr, providing this material as a promising building block for future spintronic devices.
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Research context

OpenAlex topics: 2D Materials and Applications · MXene and MAX Phase Materials · Graphene research and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology University of Science and Technology of China Hefei Anhui 230029 China

Anhui Key Laboratory of Magnetic Functional Materials and Devices Institute of Physical Science and Information Technology Anhui University Hefei Anhui 230601 China

Center of Free Electron Laser & High Magnetic Field, Institute of Physical Science and Information Technology Anhui University Hefei Anhui 230601 China

Anhui Key Laboratory of Magnetic Functional Materials and Devices School of Materials Science and Engineering Department Anhui University Hefei Anhui 230601 China

ICQD, Hefei National Laboratory for Physical Sciences at Microscale University of Science and Technology of China Hefei Anhui 230026 China

Department of Physics State Key Laboratory of Surface Physics Fudan University Shanghai 200433 China

Funding

National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities · Natural Science Foundation of Anhui Province

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