Frenkel-pair resistivity

Similar studies have been performed on Fe-40<7o Al (Rivifere et al, 1983a), CusAu, and CuAu (Alamo et al., 1986). In the latter alloys, as discussed in Section 2.1, and have been determined experimentally from the dependence of damage rate on incident electron energy. The Frenkel-pair resistivity is probably larger by a factor of 1.5 to 2 in ordered compared to disordered copper-gold alloys (Alamo et al., 1986). 

For the experimental determination of viv, it is necessary to independently measure the absolute concentration of monovacancies in the specimen. Such experiments were performed at elevated temperatures, where the equilibrium concentration of monovacancies is high enough to make the contribution from trapped positrons to the PL spectrum significant [110]. Kluin et al. [107] have correlated positron lifetime, dilatometry and lattice parameter experiments. Another way is to perform electron irradiation at low temperature [109]. The irradiation-induced Frenkel pairs are frozen in the lattice, and their concentration may be obtained by measuring the residual resistivity and dividing it by the resistivity of a Frenkel pair. 

In intermetallic compounds, the production of point defects by electron irradiation has generally been studied by electrical resistivity measurements. This has the advantage that the specific resistivity of a Frenkel pair is one to two orders of magnitude larger than that of an antisite defect. 

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