Le système formé par un film mince cohérent avec un substrat cristallin peut relaxer plastiquement son énergie interne par un recuit. Les dislocations filantes émises dans les dix premières minutes du recuit à 350 °C de l'hétérostructure Si0.68Ge0.32/Si(001) sont observées en microscopie électronique à transmission, puis identifiées par comparaison avec des images simulées de dislocations anguleuses supposées en milieu semi-infini. Elles sont de nature vis, ce qui explique la couverture rapide de l'interface par des dislocations à 60° orientées 〈110〉.
The system formed by a thin film coherent with a crystalline substrate can relax its internal energy by annealing. Threading dislocations emitted after ten minutes annealing at 350 °C of the Si0.68Ge0.32/Si(001) heterostructure are observed in transmission electron microscopy, and then identified by comparison to simulated images of angular dislocations placed in a semi infinite medium. They are of screw character, which explains the rapid coverage of the interface by 60° dislocations oriented 〈110〉.
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Keywords: Thin film, Dislocations, Transmission electron microscopy
Roland Bonnet 1 ; Sami Youssef 2 ; Salem Neily 2 ; A.K. Gutakowskii 3
@article{CRPHYS_2008__9_2_276_0, author = {Roland Bonnet and Sami Youssef and Salem Neily and A.K. Gutakowskii}, title = {Relaxation plastique d'un film mince par \'emission de dislocations filantes vis}, journal = {Comptes Rendus. Physique}, pages = {276--282}, publisher = {Elsevier}, volume = {9}, number = {2}, year = {2008}, doi = {10.1016/j.crhy.2008.01.005}, language = {fr}, }
TY - JOUR AU - Roland Bonnet AU - Sami Youssef AU - Salem Neily AU - A.K. Gutakowskii TI - Relaxation plastique d'un film mince par émission de dislocations filantes vis JO - Comptes Rendus. Physique PY - 2008 SP - 276 EP - 282 VL - 9 IS - 2 PB - Elsevier DO - 10.1016/j.crhy.2008.01.005 LA - fr ID - CRPHYS_2008__9_2_276_0 ER -
Roland Bonnet; Sami Youssef; Salem Neily; A.K. Gutakowskii. Relaxation plastique d'un film mince par émission de dislocations filantes vis. Comptes Rendus. Physique, Volume 9 (2008) no. 2, pp. 276-282. doi : 10.1016/j.crhy.2008.01.005. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2008.01.005/
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