The precipitation of Cu and Fe onto Frank-type partial dislocations which bounded bulk stacking faults in Czochralski-grown material was investigated by using electron beam-induced current techniques and transmission electron microscopy. It was found that the Frank partials in a Cu-contaminated specimen did not exhibit any electron beam-induced current contrast at room temperature when the specimen was cooled slowly. However, in Fe-contaminated specimens, they exhibited electron beam-induced current contrast at room temperature; due to Fe contamination. Transmission electron micrographs showed that Cu developed precipitate colonies in regions away from the stacking faults and did not precipitate onto Frank partials. The results indicated that Fe decorated Frank partials more easily than did Cu.

B.Shen, R.Zhang, Y.Shi, Y.D.Zheng, T.Sekiguchi, K.Sumino: Applied Physics Letters, 1996, 68[2], 214-6