Observation of skyrmion-like magnetism in magnetic Weyl semimetal Co3Sn2S2

H. C. Wu, P. J. Sun, D. J. Hsieh, H. J. Chen, D. Chandrasekhar Kakarla, L. Z. Deng, C. W. Chu, H. D. Yang

Research output: Contribution to journalArticlepeer-review

Abstract

Polycrystalline samples Co3Sn2S2+x (0 ≤ x ≤ 0.34), (Co1-yNiy)3Sn2S2.26 (0 ≤ y ≤ 0.05), and (Co1-zFez)3Sn2S2.26 (0 ≤ z ≤ 0.05) were synthesized using a solid-state-reaction method and characterized by X-ray diffraction, electron probe microanalyzer, and magnetic measurements. Single crystal Co3Sn2S2 was also grown by self-flux method and analyzed by detailed magnetic measurements to study its isotropic nature. In this study, we reproduced the low magnetic field anomalous magnetism, as previously reported, with a negligible sample-dependent effect. Furthermore, based on ac magnetic susceptibility data, we established a H-T phase diagram including the skyrmion-like A phase of Co3Sn2S2. Both application of external high-pressure and chemical substitutions revealed anomalous magnetisms in low magnetic fields. The possible origin of the field-induced A phase can be the non-collinear skyrmion-like phenomenon. These interesting findings in Weyl semimetal Co3Sn2S2 provide a new candidate in spin-frustrated systems to explore the complexity of magnetic field–induced magnetism.

Original languageEnglish
Article number100189
JournalMaterials Today Physics
Volume12
DOIs
Publication statusPublished - 2020 Mar

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Energy (miscellaneous)
  • Physics and Astronomy (miscellaneous)

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