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Proceedings Paper

Infrared reflectivity study of Cu-doped PbTiO3 and PbZr0.52Ti0.48O3 ferroelectric thin films
Author(s): Ruben K. Hovsepyan; E. A. Kafadaryan; Eduard S. Vardanyan; Stephan G. Grigoryan; Ruben S. Vardanyan; Alexander L. Manukyan
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Paper Abstract

Monocrystalline c-axis oriented thin films of PbTiO3 with various hole concentration were prepared by Cu doping with 0.1, 0.5, 1.0 mas.% and substituting Zr for Ti (Zr:Ti equals 52:48). We report concentration-dependent far- and mid- infrared reflectivity spectra of these compounds focusing on the electronic properties. Optical functions (ε 1, ε 2, σ , -Im ε -1) have been analyzed by Kramers-Kronig transformation to reflectivity spectra measured in a frequency range of 200 - 10000 cm-1 at room temperature. Conductivity spectra show a complete semiconducting dependence that can be analyzed by Drude-Lorentz model and in the terms of dynamic interaction, which leads to a frequency dependent scattering rate and enhanced low-frequency carrier mass 0.5 mas.% Cu in PbTiO3 decreases effective mass from 3.5 to 1.5 near 200 cm-1 and increases relaxation time as compared with the undoped sample.

Paper Details

Date Published: 28 December 1999
PDF: 6 pages
Proc. SPIE 4060, New Trends in Atomic and Molecular Spectroscopy, (28 December 1999); doi: 10.1117/12.375286
Show Author Affiliations
Ruben K. Hovsepyan, Institute for Physical Research (Armenia)
E. A. Kafadaryan, Institute for Physical Research (Armenia)
Eduard S. Vardanyan, Institute for Physical Research (Armenia)
Stephan G. Grigoryan, Institute of Applied Chemistry (Armenia)
Ruben S. Vardanyan, Institute of Applied Chemistry (Armenia)
Alexander L. Manukyan, Institute of Applied Chemistry (Armenia)

Published in SPIE Proceedings Vol. 4060:
New Trends in Atomic and Molecular Spectroscopy
Gagik G. Gurzadyan; Artashes V. Karmenyan, Editor(s)

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