NEW SHORT-RANGE ORDERED STRUCTURE IN NI-GE ALLOY

A new short-range ordered structure (SROS) has been observed in a Ni-1 4 at. % Ge binary alloy by means of transmission electron microscopy. It is characterized by the diffraction intensity maxima 5/6{220} posit ions. The atomic structure of the SROS was further studied by the comp uter-aided at dynamical diffraction simulation technique. The SROS is formed by the two-dimensional periodic arrangement of Ge-rich but occu pancy-incomplete microdomains with spacing of 0.869 nm along the [112] directions on {111} planes.