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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.

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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