Structure, the lattice dynamic, and the dielectric characteristics of [Sr.sub.05][Ba.sub.0.5][Nb.sub.2][O.sub.6] films

• Published in: Physics of the solid state Vol. 59; no. 5; pp. 909 - 913
• Main Authors: Pavlenko, A.V, Zakharchenko, I.N, Anokhin, A.S, Kuprina, Yu.A, Kiseleva, L.I, Yuzyuk, Yu.I
• Format: Journal Article
• Language: English
• Published: Springer 01-05-2017
• Subjects: Movies
• ISSN: 1063-7834; 1090-6460
• DOI: 10.1134/S1063783417050249

Solid solution [Sr.sub.0.5][Ba.sub.0.5][Nb.sub.2][O.sub.6] films have been synthesized on a (111)Pt/(001)Si substrate by rf deposition in an oxygen atmosphere. The depolarized Raman spectra, the structure, and the dielectric characteristics of the films have been studied over a wide temperature range. It is found that the films were singlephase, had the tetragonal tungsten bronze structure, and had a pronounced axial texture with axis 001 directed perpendicular to the substrate surface. It is shown that the film material undergoes a diffuse phase transition to the state of a relaxor ferroelectric in the temperature range 300-425 K. Possible reasons of the regularities observed are discussed.