Polarized Raman scattering of epitaxial PbTiO3 thin film with coexisting c and a domains
SCIE
SCOPUS
- Title
- Polarized Raman scattering of epitaxial PbTiO3 thin film with coexisting c and a domains
- Authors
- Lee, SH; Jang, HM; Cho, SM; Yi, GC
- Date Issued
- 2002-04-29
- Publisher
- AMER INST PHYSICS
- Abstract
- Effects of the orientation of ferroelectric domains on the characteristics of polarized Raman spectra were studied using an epitaxially grown PbTiO3 thin film in which the c-axis oriented domains coexist with the a-axis oriented domains on MgO (001). To obtain polarized spectra for both two distinctive c and a domains, we have employed scattering configurations in which the relevant phonon wave vector, k, is perpendicular to the c axis of the tetragonal unit cell. Compared with the mode frequencies of single-crystal PbTiO3, a softening of the E(TO) phonons was evident for both c and a domains, suggesting the presence of a strong tensile film stress. In addition to this, we observed a splitting of the degenerate "silent" mode into two distinctive B-1 and E modes in an epitaxially grown film on MgO (001). (C) 2002 American Institute of Physics.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/19114
- DOI
- 10.1063/1.1473864
- ISSN
- 0003-6951
- Article Type
- Article
- Citation
- APPLIED PHYSICS LETTERS, vol. 80, no. 17, page. 3165 - 3167, 2002-04-29
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