Investigation of intrinsic point defects in rapidly quenched copper by nuclear quadrupole double resonance

Abstract

Abstract This letter reports nuclear quadrupole double-resonance (NQDOR) measurements on Cu specimens that were rapidly quenched from the melt either by Duwez's gun technique or by melt spinning. Comparison with measurements of the recovery of the residual electrical resistivity and with previous NQDOR studies of electron-irradiated Cu leads to the conclusion that the defects annealing out in the so-called recovery stage III after low-temperature electron irradiation are self-interstitials. Among the vacancy-type imperfections introduced by the rapid-quenching techniques employed in the present work there is at least one defect (presumably the divacancy) that becomes mobile in the same temperature range as self-interstitials. This is in agreement with the evidence from other work that in Cu the enthalpies of migration of divacancies and of self-interstitials are almost the same.