Superzone boundary effects in the electrical resistivity of dysprosium

The effects of superzone boundaries on the electrical resistivity of dysprosium have been studied by measuring the magnetoresistance of two crystals of dysprosium with the field applied in the basal plane. The maximum effect occurs parallel to the c axis and amounts to some 15%. The results are in agreement with the conclusions of Elliott and Wedgwood that the predominant effect is produced by superzone boundaries whose planes are perpendicular to the c axis. Some evidence for the presence of superzone boundaries whose planes are at an angle to the c axis is provided by a small magnetoresistance in the basal plane, attributable to the destruction of the superzone boundaries.