Ginzburg-Landau Approach to Elastic Effects in the Phase Separation of Solids

We introduce a Ginzburg-Landau model for solid solutions to examine elastic effects near the phase separation. As a first application the spinodal curve is calculated when the elastic moduli depend on the concentration and an external stress is applied. The instability is triggered by fluctuations with wave vectors in particular directions. This indicates the morphology of emerging domains,