Infrared imaging of magnetic octupole domains in non-collinear antiferromagnets

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外文摘要：Magnetic structure plays a pivotal role in the functionality of antiferromagnets(AFMs),which not only can be employed to encode digital data but also yields novel phenomena.Despite its growing significance,visualizing the antiferromagnetic domain structure remains a challenge,particularly for non-collinear AFMs.Currently,the observation of magnetic domains in non-collinear antiferromagnetic materials is feasible only in Mn3Sn,underscoring the limitations of existing techniques that necessitate distinct methods for in-plane and out-of-plane magnetic domain imaging.In this study,we present a versatile method for imaging the antiferromagnetic domain structure in a series of non-collinear antiferromagnetic materials by utilizing the anomalous Ettingshausen effect(AEE),which resolves both the magnetic octupole moments parallel and perpendicular to the sample surface.Temperature modulation due to AEE originating from different magnetic domains is measured by lock-in thermography,revealing distinct behaviors of octupole domains in different antiferromagnets.This work delivers an efficient technique for the visualization of magnetic domains in non-collinear AFMs,which enables comprehensive study of the magnetization process at the microscopic level and paves the way for potential advancements in applications.

外文关键词：

non-collinear antiferromagnetdomain structureinfrared imaginganomalous Ettingshausen effect

作者：

Peng Wang、Wei Xia、Jinhui Shen、Yulong Chen、Wenzhi Peng、Jiachen Zhang、Haolin Pan、Xuhao Yu、Zheng Liu、Yang Gao、Qian Niu、Zhian Xu、Hongtao Yang、Yanfeng Guo、Dazhi Hou

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作者单位：

International Center for Quantum Design of Functional Materials(ICQD),School of Emerging Technology,University of Science and Technology of China,Hefei 230026,China

College of Mathematics and Physics,Qingdao University of Science and Technology,Qingdao 266061,China

School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China

ShanghaiTech Laboratory for Topological Physics,ShanghaiTech University,Shanghai 201210,China

Department of Physics,University of Science and Technology of China,Hefei 230026,China

CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics,University of Science and Technology of China,Hefei 230026,China

Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences,Xi'an 710119,China

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基金：

National Key R&D ProgramNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Funds for the Central UniversitiesShanghai Science and Technology Innovation Action PlanDouble First-Class Initiative Fund of ShanghaiTech UniversityShanghai Sailing ProgramFundamental Research Funds for the Central UniversitiesNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central UniversitiesAnhui Initiative in Quantum Information TechnologiesInnovation Program for Quantum Science and Technology

项目编号：

2022YFA14035021223401712074366WK999000011621JC140200023YF1426900WK23400001021197432712004369WK3510000010WK2030020032AHY1700002021ZD0302800

出版年：

2024

DOI：

10.1093/nsr/nwad308

国家科学评论(英文版)

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ISSN：

年,卷(期)：2024.11(6)