journal article·2021-09Open access

Chiral Helimagnetism and One‐Dimensional Magnetic Solitons in a Cr‐Intercalated Transition Metal Dichalcogenide

Chenhui Zhang, Junwei Zhang, Chen Liu, Senfu Zhang, Ye Yuan, Peng Li, Yan Wen, Ze Jiang, Bojian Zhou, Yongjiu Lei, Dongxing Zheng, Chengkun Song, Zhipeng Hou, Wenbo Mi, Udo Schwingenschlögl, Aurélien Manchon, Zi Qiang Qiu, Husam N. Alshareef, Yong Peng, Xi‐Xiang Zhang

Advanced Materials· Volume 33· Issue 35

Abstract

Abstract Chiral magnets endowed with topological spin textures are expected to have promising applications in next‐generation magnetic memories. In contrast to the well‐studied 2D or 3D magnetic skyrmions, the authors report the discovery of 1D nontrivial magnetic solitons in a transition metal dichalcogenide 2H‐TaS2 via precise intercalation of Cr elements. In the synthetic Cr1/3TaS2 (CTS) single crystal, the coupling of the strong spin–orbit interaction from TaS2 and the chiral arrangement of the magnetic Cr ions evoke a robust Dzyaloshinskii–Moriya interaction. A magnetic helix having a short spatial period of ≈25 nm is observed in CTS via Lorentz transmission electron microscopy. In a magnetic field perpendicular to the helical axis, the helical spin structure transforms into a chiral soliton lattice (CSL) with the spin structure evolution being consistent with the chiral sine‐Gordon theory, which opens promising perspectives for the application of CSL to fast‐speed nonvolatile magnetic memories. This work introduces a new paradigm to soliton physics and provides an effective strategy for seeking novel 2D magnets.
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Research context

OpenAlex topics: 2D Materials and Applications · Magnetic properties of thin films · Multiferroics and related materials

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

Affiliations

Physical Science and Engineering Division (PSE) King Abdullah University of Science and Technology (KAUST) Thuwal 23955‐6900 Saudi Arabia

Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education School of Physical Science and Technology and Electron Microscopy Centre of Lanzhou University Lanzhou University Lanzhou Gansu Province 730000 China

Songshan Lake Materials Laboratory Dongguan Guangdong 523808 China

Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute for Advanced Materials South China Academy of Advanced Optoelectronics South China Normal University Guangzhou Guangdong Province 510006 China

National Center for International Research on Green Optoelectronics South China Normal University Guangzhou Guangdong Province 510006 China

Tianjin Key Laboratory of Low Dimensional Materials Physics and Processing Technology Institute of Advanced Materials Physics Faculty of Science Tianjin University Tianjin Tianjin Municipality 300354 China

Aix‐Marseille Université CNRS CINaM Marseille 13288 France

Department of Physics University of California Berkeley CA 94720 USA

Funding

King Abdullah University of Science and Technology · National Natural Science Foundation of China

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