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 - Funding Information:
This work was supported by the Ministry of Science and Technology , Taiwan, under grant no. MOST 106–2112–M–110–013–MY3 , MOST 108–2112–M–110–014–MY2 and MOST 107–2917–I–564–008 . The work was supported by the U.S. Air Force Office of Scientific Research under grant no. FA9550–15–1–0236 , the T. L. L. Temple Foundation, the John J. and Rebecca Moores Endowment, and the State of Texas through the Texas Center for Superconductivity at the University of Houston.
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 -