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Recent results of Raman spectroscopy studies of lattice dynamics and phase transitions in ferroelectric thin films and superlattices are reviewed. Raman studies of SrTiO 3 , BaTiO 3 , and Ba x Sr 1− x TiO 3 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 BaTiO 3 /SrTiO 3 superlattices, is demonstrated.
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Ténné et al. (2008) studied this question.
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