Dislocation scattering in copper

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Abstract
De Haas-van Alphen (DHVA) measurements have been carried out in fatigued copper crystals with average dislocation densities of approximately 1011 cm-2. The signals are unexpectedly large because the long-range strain fields of the individual dislocations are suppressed by correlations in their spatial distribution. This emphasises that dislocation arrangement as well as density is important in the DHVA effect. If the results are interpreted in terms of scattering, the ratio of the total (DHVA) scattering rate to the momentum-weighted (resistive) scattering rate is about ten, only four times larger than for impurity scattering. This implies that the dislocation scattering mechanism important in resistivity is large angle.