Abstract
The temperature behavior of polarization Raman spectra of two-layer BaTiO3/Ba0.5Sr0.5TiO3 and three-layer BaTiO3/Ba0.5Sr0.5TiO3/SrTiO3 superlattices prepared by pulsed laser deposition on (001)MgO substrates has been studied. It has been found that, at room temperature, the frequency of soft mode E(TO) in the three-layer superlattice is significantly higher (94 cm−1) than that in the two-layer superlattice (70 cm−1), which demonstrates an increase in two-dimensional stresses in epitaxial layers of the superlattice. An analysis of the temperature dependence of the integrated intensity of soft mode E(TO) suggests that the BaTiO3/Ba0.5Sr0.5TiO3 superlattice undergoes a transition from the ferroelectric to paraelectric phase at ∼540 K, and the phase transition temperature of the BaTiO3/Ba0.5Sr0.5TiO3/SrTiO3 superlattice increases to ∼610 K because of the deformation of the epitaxial layers.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
