Effect of phase transformation on the spin susceptibility of sodium

Abstract

Spin susceptibilities of the two phases of sodium have been computed using a Hellmann-type pseudopotential and a modified Coulomb potential. It is found that the spin susceptibility of the low temperature close-packed hexagonal structure at 5°K is about 3 per cent lower than that of the body-centred cubic structure. Experimental results of Schumacher and Vehse for the spin susceptibility and those of Knight for the Knight shift of sodium at cryogenic temperatures have partly been explained. © 1969.