Magnetic structure of Colossal Magnetoresistance Mn<sub>3</sub>(Si<sub>1-x</sub>Ge<sub>x</sub>)<sub>2</sub>Te<sub>6</sub> under c-axis field
ORAL
Abstract
Recently discovered colossal magnetoresistance (CMR) Mn3Si2Te6 [1–3] has shown stark contrast with conventional CMR manganites and pyrochlore materials. The resistivity in Mn3Si2Te6 drops by orders of magnitude leading to an insulator-metal transition with an applied magnetic field just above 4 T. The CMR occurs only when the field is applied along the hard axis (c-axis), while such effect is absent with the field applied in the basal plane, where magnetization is fully saturated. Using single crystal neutron diffraction, we have conducted systematic study of the ground state spin structures of the parent and Ge-doped Mn3Si2Te6 and evolution of the corresponding spin configurations with magnetic field up to 14 Tesla along the c-axis. The modification of the spin order and the relevant mechanism responsible for the CMR will be discussed [4].
[1] Y. Ni et al., Phys. Rev. B 103, L161105 (2021).
[2] J. Seo et al., Nature 599, 576 (2021).
[3] Y. Zhang et al., Nature (2022). https://doi.org/10.1038/s41586-022-05262-3
[4] F. Ye et al., to be published in Phys. Rev. B (2022).
[1] Y. Ni et al., Phys. Rev. B 103, L161105 (2021).
[2] J. Seo et al., Nature 599, 576 (2021).
[3] Y. Zhang et al., Nature (2022). https://doi.org/10.1038/s41586-022-05262-3
[4] F. Ye et al., to be published in Phys. Rev. B (2022).
*Research at ORNL’s HFIR and SNS was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy (DOE). Work at the University of Colorado was supported by NSF via Grant No. DMR 1903888.
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Publication: arXiv preprint arXiv:2209.13664 (to be published in Phys. Rev. B)
Presenters
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Feng Ye
- Oak Ridge National Lab
- SNS, ORNL