Abstract
Transition metal telluride, Co1+δTe nanostructures are synthesized using the hydrothermal method. These nanostructures exhibit filled NiAs-type hexagonal crystal structure also known as Ni2In structure with the space group p63/mmc. The Co1+δTe nanostructures exhibit hard ferrimagnetic behavior below 40 K. The coercivity increases with the decrease in temperature, which is around 4.90 kOe at 3 K. The saturation magnetization is 0.6 μB/Co atom. Electrical transport measurements show that the Co1+δTe nanostructures are nonmetallic in nature with the resistance increases with the decrease in temperature. It does not follow the thermal excitation law for semiconductors, but can be explained by the Motts three-dimensional variable range hopping model.
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