On the anisotropies of magnetization and electronic transport of magnetic Weyl semimetal Co3Sn2S2

• Published in: Applied physics letters Vol. 115; no. 21
• Main Authors: Shen, Jianlei, Zeng, Qingqi, Zhang, Shen, Tong, Wei, Ling, Langsheng, Xi, Chuanying, Wang, Zhaosheng, Liu, Enke, Wang, Wenhong, Wu, Guangheng, Shen, Baogen
• Format: Journal Article
• Language: English
• Published: Melville American Institute of Physics 18.11.2019
• Subjects: Anisotropy; Applied physics; Dependence; Electron transport; Ferromagnetism; Kagome lattice; Magnetic properties; Magnetization; Saturation; Transport properties
• ISSN: 0003-6951; 1077-3118
• DOI: 10.1063/1.5125722

Co3Sn2S2, a quasi-two-dimensional system with a kagome lattice, has been found to be a magnetic Weyl semimetal recently. In this work, the anisotropies of magnetization and transport properties of Co3Sn2S2 were investigated. The high field measurements reveal a giant magnetocrystalline anisotropy with an out-of-plane saturation field of 0.9 kOe and an in-plane saturation field of 230 kOe at 2 K, showing a magnetocrystalline anisotropy coefficient Ku up to 8.3 × 105 J m−3, which indicates that it is extremely difficult to align the small moment of 0.29 μB/Co on the kagome lattice from the c axis to the ab plane. The out-of-plane angular dependence of Hall conductivity further reveals strong anisotropies in the Berry curvature and ferromagnetism, and the vector directions of both are always parallel with each other. For the in-plane situation, the longitudinal and transverse measurements for both I // a and I ⊥ a cases show that the transport on the kagome lattice is isotropic. These results provide the essential understanding of the magnetization and transport behaviors for the magnetic Weyl semimetal, Co3Sn2S2.