The temperature dependence of hyperfine fields at impurities in Fe

Abstract
The variations in the hyperfine fields on the dilute non-magnetic impurities Cu, Ga, As, In, Sb and Au in Fe were measured from 4 to 550K. For FeSb, Hemp(T)/ mu Fe(T) increases as the temperature is raised; for the other cases this ratio drops with increasing temperature. It is suggested that the mass of the impurity may play a role in the temperature dependence.