The Hall Effect in Single Crystals of Barium Oxide

Abstract

The Hall effect has been measured as a function of temperature, between 400°K and 800°K, in single crystals of barium oxide using an ac system. Conduction was predominantly $N$-type. The value of $\frac{({{\mu }_e}^2-{{\mu }_h}^2)}{({\mu }_e+{\mu }_h)}$ was about 3 ${\mathrm{cm}}^2$/volt sec between 600°K and 700°K and varied only slightly with temperature over the entire range studied. ${\mu }_e$ is thought to lie between 3 and 9 ${\mathrm{cm}}^2$/volt sec. There was some evidence that conduction was intrinsic at the higher temperatures in the samples studied.