Soft mode in heteroepitaxial (Ba, Sr)TiO3/MgO thin films

Authors
Yuzyuk, YI Almeida, A Chaves, MR Alyoshin, VA Zakharchenko, IN Sviridov, EV
Citation
Yi. Yuzyuk et al., Soft mode in heteroepitaxial (Ba, Sr)TiO3/MgO thin films, PHYS ST S-B, 222(2), 2000, pp. 535-540
Citations number
26
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA STATUS SOLIDI B-BASIC RESEARCH
ISSN journal
03701972 → ACNP
Volume
222
Issue
2
Year of publication
2000
Pages
535 - 540
Database
ISI
SICI code
0370-1972(200012)222:2<535:SMIH(S>2.0.ZU;2-A
Abstract
Polarized Raman spectra of tetragonally distorted (Ba1-xSrx)TiO3/MgO ferroe lectric films were obtained in special scattering geometries using a micro- Raman set-up. The underdamped E(TO) soft mode was unambiguously observed in the films with x = 0.30 and 0.45. The low-temperature behaviour of the E(T O) soft mode for x = 0.45 was found substantially different from those obse rved in pure crystals and bulk solid solutions.