Recrystallization of amorphous ion implanted silicon carbide after thermal annealing
Langue
en
Article de revue
Ce document a été publié dans
Philosophical Magazine Letters. 2012, vol. 92, p. 633-639
Taylor & Francis
Résumé en anglais
Single crystals of 6H-SiC were implanted at room temperature with 4-MeV Au ions to a fluence of 1015cm 2. Raman spectra showed that full amorphization was achieved. The recrystallization process was studied by micro-Raman ...Lire la suite >
Single crystals of 6H-SiC were implanted at room temperature with 4-MeV Au ions to a fluence of 1015cm 2. Raman spectra showed that full amorphization was achieved. The recrystallization process was studied by micro-Raman spectrometry after isochronal thermal annealing between 700 and 1500 C. The spectra permitted the evolution upon annealing of Si-C bonds, and also of Si-Si and C-C bonds, to be followed. Amorphous phase relaxation takes place below 700 C; then recrystallization of the 6H polytype sets in at 700 C. At 900 C crystallites with different crystalline states are formed. Moreover, Raman spectra provide evidence of graphitic nanocluster formation at 1500 C.< Réduire
Mots clés en anglais
SiC
Raman spectroscopy
recrystallization
irradiation effects
Origine
Importé de halUnités de recherche