Three dimensional heteroepitaxy in self-assembled nanostructures

Take BaTiO₃-CoFe₂O₄ as an example:
1. Intrinsic similarity in crystal chemistry between perovskite and spinel. Both of them have octahedral oxygen coordination. Lattice mismatch is about 5%. CoFe₂O₄: a=0.838nm
2. Very little solid solubility in each other
3. Suitable substrate with similiar crystal structure, such as STO