TY - JOUR
T1 - Observation of skyrmion-like magnetism in magnetic Weyl semimetal Co3Sn2S2
AU - Wu, H. C.
AU - Sun, P. J.
AU - Hsieh, D. J.
AU - Chen, H. J.
AU - Kakarla, D. Chandrasekhar
AU - Deng, L. Z.
AU - Chu, C. W.
AU - Yang, H. D.
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/3
Y1 - 2020/3
N2 - 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.
AB - 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.
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U2 - 10.1016/j.mtphys.2020.100189
DO - 10.1016/j.mtphys.2020.100189
M3 - Article
AN - SCOPUS:85080092292
SN - 2542-5293
VL - 12
JO - Materials Today Physics
JF - Materials Today Physics
M1 - 100189
ER -