Novel magnetic properties of CoTe nanorods and diversified CoTe₂ nanostructures obtained at different NaOH concentrations

Abstract

CoTe and CoTe₂ nanorods with average diameter of 100 nm were synthesized by a simple hydrothermal process, and different CoTe₂ nanostructures were obtained by changing the NaOH concentration. CoTe nanorods exhibit weak ferromagnetism while CoTe₂ nanorods present paramagnetic behavior. Different magnetic behaviors occur in the other CoTe₂ nanostructures due to Na⁺ entrance into CoTe₂ crystals. A first-principles study on Na-doped CoTe₂ confirms the magnetic characteristics.

Keywords:

• CoTe₂
• nanorods
• nanostructures
• magnetic properties
• first-principles

Classification:

• 40 Optical, magnetic and electronic device materials
• 102 Porous/Nanoporous/Nanostructured materials
• 401 1st principle calculations
• 203 Magnetics/Spintronics/Superconductors
• 301 Chemical syntheses/processing