Pressure and doping effects on the low-field anomalous magnetism in kagome Co<sub>3</sub>Sn<sub>2</sub>S<sub>2</sub>

ORAL

Abstract

Polycrystalline samples Co3Sn2S2+x (0 ≤ x ≤ 0.34) and (Co1-xMx)3Sn2S2.26 (M = Ni and Fe, 0 ≤ x ≤ 0.05) have been synthesized using solid-state-reaction and characterized by X-ray diffraction (XRD) and electron probe microanalyzer (EPMA). Basically, we are able to reproduce the phase diagram (so-called A phase) as previously reported with negligible sample dependent effect. Furthermore, following the similar procedure and analysis, a so-called A' phase within phase can be sketched in H-T phase diagram of Co3Sn2S2. Under the effects of external high-pressure and chemical substitutions, the anomalous magnetisms (A and A' ) in low magnetic field show a significant change. The possible origin of the field-induced A' phase could be ascribed to the non-collinear skyrmion-like phenomena. These striking findings provide a new candidate in spin-frustrated systems to explore the complexity of magnetic-field-induced magnetism.

*This work was supported by the Ministry of Science and Technology, Taiwan, under Grant Nos. MOST 106–2112–M–110–013– MY3 and MOST 107–2917–I–564–008

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Presenters

  • Hung-Cheng Wu

    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston TX 77204
    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204
    • Texas Center for Superconductivity, University of Houston, Texas 77204, USA
    • Physics, Texas Center for Superconductivity at the University of Houston
    • Texas Center for Superconductivity and Department of Physics, University of Houston

Authors

  • Hung-Cheng Wu

    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston TX 77204
    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204
    • Texas Center for Superconductivity, University of Houston, Texas 77204, USA
    • Physics, Texas Center for Superconductivity at the University of Houston
    • Texas Center for Superconductivity and Department of Physics, University of Houston

  • Po-Jung Sun

    • Physics, National Sun Yat-Sen University, Taiwan
    • Department of Physics, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan

  • Dong-Jie Hsieh

    • Physics, National Sun Yat-Sen University, Taiwan
    • Department of Physics, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan

  • D Chandrasekhar Kakarla

    • National Sun Yat-sen University
    • Center of Crystal Research, National Sun Yat-sen University, Kaohsiung, 804 Taiwan
    • Center of Crystal Research, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan

  • Ching-Wu Chu

    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston TX 77204
    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204
    • Texas Center for Superconductivity, University of Houston, Texas 77204, USA
    • The Texas Center for Superconductivity, University of Houston
    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204, USA

  • Hung-Duen Yang

    • Department of Physics, National Sun Yat-sen University, Kaohsiung, 804 Taiwan
    • Physics, National Sun Yat-Sen University, Taiwan
    • Department of Physics, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan
    • Physics, National Sun Yat-sen University