Domain Dynamics under Unipolar Electric Fields for BaTiO₃ Single Crystals

Abstract:

Domain structures and dynamics of BaTiO₃ single crystals under in-situ electric fields along <110>_c were investigated by using synchrotron radiation single-crystal X-ray diffractions. Diffraction patterns clearly show the presence of a 90 ^° domain structure in the crystals poled along <110>_c. The diffraction analysis provides direct evidence of a reversible change in the volume fractions of two kinds of the 90 ^o domains under unipolar in-situ electric fields. This reversible change in the domain structures under unipolar fields is suggested to originate from the interaction between spontaneous polarization and defect dipoles composed of acceptor and oxygen vacancy.

• Periodical: Key Engineering Materials (Volume 582)
• Pages: 40-43
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.582.40
• Online since: September 2013
• Authors: Shotaro Ishikawa, Yuuki Kitanaka, Yuji Noguchi, Masaru Miyayama, Chikako Moriyoshi, Yoshihiro Kuroiwa
• Keywords: BaTiO₃, Defect, Domain Structure, Dynamic, In Situ Electric Fields, Single Crystal

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