Fig. 6.

Differential fractional isochronal annealing after torsional deformation at 77 K, as a function of temperature. The specimen (“99.999 % pure”) was annealed for 360 s at each temperature, over 20 K intervals. The peaks at 110 K and at 250 K identify major annealing stages. The residual resistivity ρ₀ was measured at 4.2 K. The original paper had, as the ordinate label, Δ(Δρ/Δρ₀)/ΔT. However, ρ₀ should not change in the given experiment. We believe the correct ordinate is Δ(Δρ/Δρ₀)/ΔT, the change in fractional recovery of resistivity with temperature. [30]