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January 27th, 2010

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

Published on January 27th, 2010 | By: pwray@ceramics.org

Volume 93 Issue 1, Pages 256 – 264

 

Giuseppe Pezzotti, Atsuo Matsutani, Wenliang Zhu
Published Online:
Oct 14 2009 11:42AM

DOI: 10.1111/j.1551-2916.2009.03340.x

 

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.

 

Online Access to Journal of the American Ceramic Society


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