Dissertation of Zhuopeng Tan

Main tasks of our research include: (1)exploring optimum growth conditions for PLD deposition of self-assembled nanophase PbTiO3-CoFe2O4 films with different compositions and orientations; (2)analyzing morphologies and nanostructures of the two-phase films to clarify relative effects of elastic energy and interface energy on the self-assembled film formation; (3)investigating stress state and relaxation of stresses arising as a result of a paraelectric-ferroelectric transformation in PbTiO3; (4)exploring ferroelectric state in the confined PbTiO3 nanophase in the films with {110} and {111} orientations.