TEM Observation on Ferroelectric Domain Structures of PbTiO₃ Epitaxial Films

Abstract:

The ferroelectric domain structure of PbTiO₃ (PTO) films was investigated by using transmission electron microscopy (TEM). In the film with PTO/SrTiO₃ (STO) structure, 180º domains are formed near the SrTiO₃ (STO) substrate and the domain length of 180º domains is 100 nm. However, 180º domains are not formed in the film with Pt/PTO/SrRuO₃ (SRO)/STO structure. These results show that 180º domains are formed in order to minimize depolarizing field energy, and that the domain length of 180º domains is determined by the competition among the depolarizing field energy, domain wall energy, Coulomb interaction and elastic interaction.

• Periodical: Key Engineering Materials (Volume 485)
• Pages: 179-182
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.485.179
• Online since: July 2011
• Authors: Kenta Aoyagi, Takanori Kiguchi, Yoshitaka Ehara, Hiroshi Funakubo, Toyohiko J. Konno
• Keywords: Ferroelectric Thin Film, PbTiO₃, TEM

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