Raman spectroscopy of ferroelectric thin films and superlattices

Recent results of Raman spectroscopy studies of lattice dynamics and phase transitions in ferroelectric thin films and super-lattices are reviewed. Raman studies of SrTiO3, BaTiO3, and BaxSr1-xTiO3 thin films in comparison with corresponding single crystals are presented; essential differences in the lattice dynamics behavior of thin films and single crystals are discussed. Application of ultraviolet Raman spectroscopy for studies of nanoscale ferroelectric heterostructures, such as BaTiO3/SrTiO3 superlattices, is demonstrated.