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Spectroscopic Assessments of Domain Texture in Barium Titanate: I. Confocal Raman Polarization Analysis

Authors

  • Giuseppe Pezzotti,

    Corresponding author
    1. RIN-Research Institute for Nanoscience & Ceramic Physics Laboratory, Kyoto Institute of Technology, 606-8585 Kyoto, Japan
      †Author to whom correspondence should be addressed. e-mail: pezzotti@chem.kit.ac.jp
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  • Atsuo Matsutani,

    1. RIN-Research Institute for Nanoscience & Ceramic Physics Laboratory, Kyoto Institute of Technology, 606-8585 Kyoto, Japan
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  • Wenliang Zhu

    1. RIN-Research Institute for Nanoscience & Ceramic Physics Laboratory, Kyoto Institute of Technology, 606-8585 Kyoto, Japan
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  • M. J. Hoffman—contributing editor

†Author to whom correspondence should be addressed. e-mail: pezzotti@chem.kit.ac.jp

Abstract

A three-dimensional quantitative Raman analysis of ferroelectric domain orientation is presented for single-crystalline barium titanate (BaTiO3; BT). The analysis has been developed according to basic principles of polarized/confocal Raman spectroscopy and is aimed at visualizing in three dimensions the geometrical (local) distribution of domain c-axis in the solid angle. In the first part of the paper, the relative intensity modulation of the BT Raman phonon modes has been theoretically modeled for a BT single crystal as a function of three Euler angles; then, the complete set of Raman tensor elements has been experimentally retrieved for the Ag, the B1, and the Eg vibrational modes of BT. The proposed polarized Raman algorithm is finally applied to the visualization of domain patterns in BT single crystal and the possibility of nondestructively visualizing domain textures in depth is shown; thus, we demonstrate that polarized Raman spectroscopy is a valuable and efficient tool for nondestructive in space assessments of domain orientation in ferroelectric materials.

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