Hall mobility measurements in HF doped ice

Abstract

Hall measurements on HF doped water ice crystals showed no signals comparable with those reported by Bullemer and Riehl on pure crystals. This may either be due to the considerably different techniques of their dc method compared to our double frequency method or it may be a result of the different nature of the samples. We find a small signal which can only be removed from the noise by extended runs that indicates a mobility of +4.2±2.8×10−3 cm2/V·sec at − 5°C. The sign is characteristic of positive charge carriers. This is of the same order of magnitude as the drift mobility reported in the literature.