Magnetic and Electrical Properties of Ni 3 Te 2 Single Crystals Grown by Physical Vapor Transport Technique

High-quality Ni 3 Te 2 single crystals with length up to 6 mm are successfully grown by the physical vapor transport (PVT) technique. The crystals exhibit unique tubular structures with a hexagonal cross section. The high-quality crystal is studied by a series of structural and morphological characterization. The physical properties including both magnetization and electrical transport are studied in detail. It is found that there exists a coexistence of weak ferromagnetism and antiferromagnetism at low temperatures. In the measured temperature range of 2-300 K, Ni 3 Te 2 shows a typical metallic behavior, and the temperature dependence of the resistivity rho ( x ) ( x )(T) can be well fitted by the parallel-resistor model.