De Haas-van Alphen study of AuGa2 alloy phase

The de Haas-van Alphen frequency (F) of the third zone neck orbit (C prime sub 3), the Dingle temperature (T sub d), and the residual resistance ratio (RRR) of the intermetallic compound AuGA2 were measured on samples cut from the top, middle, and bottom of three single crystals to see if these parameters vary over the range of composition in which the fluorite structure exists. F ranged from 3388 kG to 3384.2 kG to 3405.7 kG. Assumption of the rigid band model implies for these samples a concentration range about stoichiometry less than .06 at .% Ga. But analogy to the case of Pd impurity associates a value between .22 and .43 at .% Ga with the range of F. Stoichiometry does not coincide exactly with the congruent point. The dHvA phase constant was found to be .46 + or - .09. RRR and TD varied from 55 to 1800 and from 5.0 to 1.1 K, respectively.