Pressure and doping effects on the low-field anomalous magnetism in kagome Co3Sn2S2

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.

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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