The Au-In system was the subject of our comprehensive study with the perturbed angular correlation technique. Bulk samples of all intermetallic phases shown in the phase diagram were prepared to determine the hyperfine interaction parameters and their temperature dependence. A polymorphic phase transformation in the AuIn phase at about 630 K and a new metastable modification of Au_7In_3 after quenching the sample of 30 at.% In from temperature above 700 K were found. In addition, formation of the Au-In phases of different stoichiometries at the interfaces of thin Au/In films was observed. It turned out that the starting composition of bilayer samples, i.e. the thickness ratio of the Au and In layers, strongly influenced the stoichiometry of the formed compounds.
Perturbed γ-γ angular correlation spectroscopy was applied to study hyperfine interaction parameters for ^{111}In probes in intermetallic compounds of D8_{2} structure. The perturbed γ-γ angular correlation spectra measured in Ag_{5}Zn_{8} and Ag_{5}Cd_{8} phases reflect a number, population and symmetry of nonequivalent substitutional sites occupied by the indium probes. The temperature dependences of the observed electric field gradients were measured in the temperature range 37-500 K
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