Hall coefficient of dilute Cu-Au(Fe) alloys. I. Experiment

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Abstract
We have measured the Hall coefficient of a series of Cu-Au alloys containing dilute amounts of Fe, where both the host Cu-Au composition and the Fe-impurity concentration were varied. We find that the Hall coefficient due to the Fe impurity is strongly field and temperature dependent. The dependence on impurity concentration is predominantly linear, contrary to expectations of most previous theoretical calculations based on the free-electron model. Our results can be explained in terms of a theory which includes a multiple-carrier host, and which is presented in the following paper. As a function of host composition, the temperature and field dependence are found to be consistent with the existence of a low-temperature spin-compensated state.