Published online by Cambridge University Press: 28 February 2011
We describe the epitaxial growth of TbSi2. In this study, terbium metal is evaporated onto (111) silicon and annealed to form terbium suicide, where the pressure during all procedures is maintained below 5×10-10 Torn The interdiffusion of terbium with silicon occurs at room temperature as determined by in-situ Auger electron spectroscopy. Low energy electron diffraction shows a sharp pattern of the hexagonal suicide after an 850°C anneal. Rutherford backscattering analysis indicates single-crystal growth with a channeling minimum yield of 7–8% for 120Å thick suicide films annealed to 800–900°C. These metal reacted films have pinholes with an average size of less than 0.5 µm and a fault structure along (220) silicon. Electrical measurements show metallic conduction with a room temperature resistivity of 110 µΩ-cm and evidence of magnetic ordering at 38K.