Atomic Defects in Metals · Ir

This chapter discusses data on defect properties of iridium (Ir). The isochronal annealing curve of the electrical resistivity of Ir and differential recovery curve after electron irradiation is shown. Stage I has been attributed to the large annealing stage at T˜50 K observed after e^--irradiation. Interstitial migration to the surface has been observed by FIM, indicating that stage I is within this temperature range. Stage III is attributed to vacancy migration, due to the observation of defect trapping at In probes by PAC. The dynamics of the indium atom has been investigated by additional PAC experiment. Stage V might be expected around 900ºC from the observation of the shrinkage of defect clusters by FIM and TEM after heavy ion irradiation. The Frenkel pair resistivity has been estimated from the measurements of resistivity damage rates.