Inhomogeneous-strain-induced magnetic vortex cluster in one-dimensional manganite wire

Iftikhar Ahmed Malik; Houbing Huang; Yu Wang; Xueyun Wang; Cui Xiao; Yuanwei Sun; Rizwan Ullah; Yuelin Zhang; Jing Wang; Muhammad Abdullah Malik; Irfan Ahmed; Changmin Xiong; Simone Finizio; Mathias Kläui; Peng Gao; Jie Wang; Jinxing Zhang

doi:10.1016/j.scib.2019.11.025

Inhomogeneous-strain-induced magnetic vortex cluster in one-dimensional manganite wire

Sci Bull (Beijing). 2020 Feb 15;65(3):201-207. doi: 10.1016/j.scib.2019.11.025. Epub 2019 Nov 27.

Authors

Iftikhar Ahmed Malik¹, Houbing Huang², Yu Wang³, Xueyun Wang⁴, Cui Xiao⁵, Yuanwei Sun⁶, Rizwan Ullah¹, Yuelin Zhang¹, Jing Wang¹, Muhammad Abdullah Malik¹, Irfan Ahmed¹, Changmin Xiong⁷, Simone Finizio⁸, Mathias Kläui⁸, Peng Gao⁹, Jie Wang¹⁰, Jinxing Zhang¹¹

Affiliations

¹ Department of Physics, Beijing Normal University, Beijing 100875, China.
² Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China.
³ Department of Engineering Mechanics & Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou 310027, China.
⁴ School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China.
⁵ Department of Physics, University of Science and Technology Beijing, Beijing 100083, China.
⁶ International Center for Quantum Materials and Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871, China.
⁷ Department of Physics, Beijing Normal University, Beijing 100875, China. Electronic address: cmxiong@bnu.edu.cn.
⁸ Department of Physics, Johannes Gutenberg-University Mainz, Mainz 55099, Germany; Graduate School of Excellence Materials Science in Mainz, Mainz 55128, Germany.
⁹ International Center for Quantum Materials and Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871, China; Collaborative Innovation Center of Quantum Matter, Beijing 100871, China.
¹⁰ Department of Engineering Mechanics & Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou 310027, China. Electronic address: jw@zju.edu.cn.
¹¹ Department of Physics, Beijing Normal University, Beijing 100875, China. Electronic address: jxzhang@bnu.edu.cn.

PMID: 36659173
DOI: 10.1016/j.scib.2019.11.025

Abstract

Mixed-valance manganites with strong electron correlation exhibit strong potential for spintronics, where emergent magnetic behaviors, such as propagation of high-frequency spin waves and giant topological Hall Effects can be driven by their mesoscale spin textures. Here, we create magnetic vortex clusters with flux closure spin configurations in single-crystal La_0.67Sr_0.33MnO₃ wire. A distinctive transformation from out-of-plane domains to a vortex state is directly visualized using magnetic force microscopy at 4 K in wires when the width is below 1.0 μm. The phase-field modeling indicates that the inhomogeneous strain, accompanying with shape anisotropy, plays a key role for stabilizing the flux-closure spin structure. This work offers a new perspective for understanding and manipulating the non-trivial spin textures in strongly correlated systems.

Keywords: Cryo-Temperature MFM; Epitaxial thin films; Inhomogeneous strain; Magnetic vortex cluster; One-dimensional manganites.