In case of dislocation, because of the high energy, dissociation is more
strongly occurred to reduce the energy. Rosenbaum suggested a dissociation mechanism of
dislocation as equation 2.4. Although such dissociation was reasonable in terms of
energy reduction, it was not observed by experimentally ([Rosenbaum 64]). The use of TEM
enables more clear dislocation observation. Morozumi et al. suggested the dissociation of
dislocation based on their TEM observation as equation 2.5