Abstract
We performed angular correlation measurements of positrons annihilating in αCuZn single crystals. The orientation of the specimens was parallel to the (100), (110) and (111) directions. The results are compared with a model calculation for the Fermi surface of this alloy, assuming that every Zn atom adds two electrons to the total number of conduction electrons. The cross-sectional areas normal to the (100), (110) and (111) axes of the Fermi surface constructed in this way are compared with the experimental data. According to the evidence and conclusions in Ref. [1], we interpret the experimental results in terms of the topology of the Fermi surface. For a 77·7% Cu 22·3% Zn concentration alloy we find a radius for the necks along the (111) directions of 0·27±0·02 in units of the Fermi momentum.
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