Journal
APPLIED PHYSICS LETTERS
Volume 81, Issue 13, Pages 2439-2441Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1509859
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In view of the difficulty in preparing single crystals, a c-axis oriented epitaxial lead zirconate titanate (PZT) film was prepared as a model system for the single-crystalline PZT. By employing an extraordinary backscattering configuration in which the relevant phonon wave vector, k, is parallel to the film/substrate interface, we have successfully isolated the E [transverse optical (TO)] symmetry phonons from A(1)(TO) phonons. Compared with polarized Raman spectra of the c-axis oriented PbTiO3 film, the polarized spectra of the epitaxial PZT film (with Zr/Ti=40/60) exhibited significant asymmetric line broadening with a noticeable downward shift of the mode frequencies. In addition to this, we observed a splitting of the silent mode into the B-1-symmetry mode and the E(TO) mode using the parallel and cross polarization configurations, respectively. (C) 2002 American Institute of Physics.
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