F. Glas, TRANSMISSION ELECTRON-MICROSCOPY CONTRAST FROM STATIC ATOMIC DISPLACEMENTS IN HOMOGENEOUS RANDOM ALLOYS, Philosophical magazine letters, 69(5), 1994, pp. 269-277
We demonstrate the existence of a new type of contrast in transmission
electron microscopy. It appears in alloys displaying an atomic size e
ffect and is induced by the field of static atomic displacements from
the sites of the average lattice. The characteristics of this contrast
. which exists even in homogeneous alloys, are investigated by dynamic
image calculations upon very large simulated crystals of random terna
ry III-V alloys. The computed contrast behaves in the same way as the
previously unexplained fine-scale contrast observer in the experimenta
l micrographs of these alloys.