Nanoscale quantum imaging of magnetic domains in noncollinear antiferromagnet Mn<sub>3</sub>Sn

ORAL

Abstract

Recently, non-collinear antiferromagnets have attracted immense interest owning to their topologically protected band structure, non-collinear magnetic order, and spontaneous time-reversal symmetry breaking. As a prominent material candidate of this family, Mn3Sn has been the subject of intensive research, showing rich fundamental physics as well as enormous technological promise for practical applications. Here, we report quantum imaging of magnetic domains in noncollinear antiferromagnet Mn3Sn and visualize their microscopic response to external magnetic field and spin-orbit torques at the nanoscale. Our results ascertain the advantages of NV quantum metrology in both spatial and field sensitivity for studying nanomagnetism hosted by emergent condensed matter systems. We highlight that the presented NV measurement platform could be extended naturally to a broad range of quantum materials, opening new opportunities for studying the interplay between topology and magnetism.

*This work was supported by Air Force Office of Scientific Research (AFOSR) under award FA9550-20-1-0319, its Young Investigator Program under award FA9550-21-1-0125, U. S. National Science Foundation (NSF) under award ECCS-2029558 and DMR-2046227. Development of scanning NV magnetometry techniques was supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), under award No. DE-SC0022946. Y.X., J.A.B., and E.E.F were supported as part of Quantum Materials for Energy Efficient Neuromorphic Computing, an Energy Frontier Research Center funded by the U.S. DOE, Office of Science (Award No. DE-SC0019273). L.W. and H.C. were supported by the National Science Foundation CAREER Grant DMR-1945023.

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Publication: G. Q. Yan, S. Li, H. Lu, M. Huang, Y. Xiao, L. Wernert, J. A. Brock, E. E. Fullerton, H. Chen, H. L. Wang, C. H. R. Du, Quantum sensing and imaging of spin–orbit-torque-driven spin dynamics in the non-collinear antiferromagnet Mn3Sn, Adv. Mater. 34, 2200327 (2022).

Presenters

  • Senlei Li

    • University of California, San Diego

Authors

  • Senlei Li

    • University of California, San Diego

  • Gerald Q Yan

    • University of California, San Diego

  • Hanyi Lu

    • University of California San Diego
    • University of California, San Diego

  • Mengqi Huang

    • University of California, San Diego

  • Yuxuan Xiao

    • University of California San Diego
    • University of California, San Diego
    • Center for Memory and Recording Research, University of California, San Diego

  • Luke Wernert

    • Colorado State University

  • Jeffrey A Brock

    • University of California, San Diego
    • Center for Memory and Recording Research, University of California, San Diego

  • Eric E Fullerton

    • University of California, San Diego
    • Center for Memory and Recording Research, University of California, San Diego

  • Hua Chen

    • Colorado State University

  • Hailong Wang

    • University of California, San Diego

  • Chunhui R Du

    • University of California, San Diego