Abstract
The Hall effect and resistivity have been measured in a series of dilute binary Al-Cu and Al-Si alloys, and a number of ternary Al-Cu-Si alloys. The results have been compared with the predictions of the two band model of Takano (1966), and show that the model is invalid in these cases. There is a simple, nearly linear, relationship between the Hall effect change and the resistivity change in all the alloys and it is concluded that scattering terms dominate the Hall effect changes: in comparison, effects on the Fermi surface due to changes in electron to atom ratio seem negligible. Theory suggests however that normally the resistivity does not appear in expressions for Hall effect, but only the anisotropy of the resistivity. The present results do not permit this anomaly to be resolved.
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