Magnetic and electrical properties of Co2Te3 single crystal

• Published in: Journal of alloys and compounds Vol. 983; p. 173884
• Main Authors: Wu, Wei-Bin, Chen, Yuan-Qiao, Xiao, Qi-Ling, Ge, Jun-Yi
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 05.05.2024
• Subjects: Co2Te3; Magnetic properties; Single crystal growth; Co2Te3; Single crystal growth; Magnetic properties
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2024.173884

The Co-Te system has become a prominent field of research in recent times. CoTe2 is confirmed to be a Dirac semimetal, while Co2Te is predicted to host the quantum anomalous Hall effect. Here, we have successfully grown high-quality Co2Te3 single crystals using the solid-state reaction method and have characterized them using the energy dispersive X-ray spectroscopy, the X-ray diffraction and Laue diffraction. The X-ray rocking curve with a full-width at half-maximum of 0.067° shows Co2Te3 single crystals have good crystalline quality and mosaicity. Co2Te3 single crystals possess a hexagonal structure with the space group of P63/mmc. Resistivity measurements reveal typical metallic behavior with a transition from Non-Fermi liquid to low-temperature Landau Fermi-liquid behavior around 50 K, which can be fitted by the parallel resistance model. Magnetic measurements show no obvious anisotropy between the in-plane and out-of-plane directions with the presence of a small magnetic hysteresis at 1.8 K. Furthermore, Co2Te3 single crystals undergo a magnetic phase transition around 50 K and an antiferromagnetic transition modulated by the magnetic field below 8 K. •Co2Te3 single crystals have hexagonal structure with a space group of P63/mmc.•Resistivity shows a transition from Non-Fermi liquid to Fermi-liquid behavior.•The split in the ZFC and FC curves below 50 K suggests a magnetic transition.•A magnetic field-modulated antiferromagnetic transition exists below 8 K.•Co2Te3 exhibit consistent magnetism with no obvious anisotropic behavior.