<i>In situ</i>observation of commensuration process of long-period superlattice in the Ag-Mg alloys

Abstract

In situ observation of the commensuration process of the long-period superlattice in an Ag--24-at.%-Mg alloy annealed at 219 \ifmmode^\circ\else\textdegree\fi{}C for 39 d was made by transmission electron microscopy at 325 \ifmmode^\circ\else\textdegree\fi{}C. The commensuration process takes place in the long-period superlattice by the elimination of discommensuration lines in the form of the motion of jellyfish patterns just as in 2H-${\mathrm{TaSe}}_{2}$.