Tunable magnetic domains in ferrimagnetic MnSb<sub>2</sub>Te<sub>4</sub>

ORAL

Abstract

Highly tunable properties make the Mn(Bi,Sb)2Te4 phase diagram a rich playground for exploring the interplay between band topology and magnetism: On one end, MnBi2Te4 (MBT) hosts axion insulator and Chern insulating states [1,2], while the band topology of Sb-substituted MnSb2Te4 (MST) is potentially sensitive to defect disorder [3]. In this work, we use magnetic force microscopy (MFM) to characterize the ferrimagnetic domains of MST. We find that an external magnetic field can be used to tune between distinct stripe and bubble domain morphologies. Moreover, the low coercive field makes it possible to manipulate domains with the MFM tip. With in-situ transport, we quantify the impact of individual domains on device properties. This work opens the door to writable domain-based devices in the M(B,S)T family.

[1] Y. Deng et al, Science 367, 895 (2020)

[2] H. Deng et al, Nature Phys. 17, 36 (2021)

[3] S. Wimmer et al, Adv. Mat. 33, 210935 (2021)

*This work was supported by Programmable Quantum Materials, an Energy Frontier Research Center funded by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), under award DE-SC0019443 and by the NSF grants DMR-2011738 and HRD-2112550.

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Presenters

  • Tatiana A Webb

    • Columbia University

Authors

  • Tatiana A Webb

    • Columbia University

  • Xiaxin Ding

    • The City College of New York

  • Afrin N Tamanna

    • The City College of New York

  • Cory R Dean

    • Columbia Univ
    • Columbia University

  • Dmitri N Basov

    • Columbia University
    • Department of Physics, Columbia University, New York, NY, USA

  • Lia Krusin-Elbaum

    • The City College of New York

  • Abhay N Pasupathy

    • Brookhaven National Laboratory & Columbia University
    • Columbia University