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

Author:

Pei Fangfang1,Yu Jingjing2,Zhou Jiayuan3,Wang Siyu1,Liu Daxiang1,Yuan Yanan1,Xi Lei4,Jin Feng5,Kan Xucai4,Wang Chao1,Wang Lingfei5,Yan Wensheng1,Wu Yizheng6,Wang Shouguo4,Chen Kai1,Ma Tianping4,Liu Xue3,Yang Mengmeng2ORCID,Li Qian1ORCID

Affiliation:

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

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

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

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

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

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

Abstract

Abstract2D 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.

Funder

National Natural Science Foundation of China

Fundamental Research Funds for the Central Universities

Natural Science Foundation of Anhui Province

Publisher

Wiley

Subject

Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials

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