Relationship of positive carriers to lithium vacancies inβ-LiAl

Abstract

Hall coefficients and lattice parameters in $\beta$-LiAl near critical composition at the Al-rich side are measured at 300 K. The results are discussed with the use of the reduction of overlap in the conduction band and the valence band, and lowering the Fermi level due to the formation of Li vacancies. It is deduced that the formation of Li vacancies in this composition considerably governs the concentration of holes. The number of holes in a unit cell is approximately equal to that of Li vacancies in a unit cell.