Abstract
Electric-field induced rearrangement of domain microstructure in an epitaxial thin film of Bi4Ti3O12 on a SrTiO3 (001) substrate is studied by optical second harmonic generation measurements. The input polarization dependence of the second harmonic signal exhibits spatial symmetries that reflect the presence of eight different domain variants present in the film. Changes in these symmetries with the application of electric field are experimentally studied at 23°C and 60°C, and theoretically modeled to extract the hysteresis loops that reflect quantitative changes in the fraction of domain variants. A strong correlation is observed between the dc electrical conductance (as distinct from transient currents) and the ferroelectric domain state of the film, which is proposed to arise from the creation and destruction of charged domain walls within the film with applied field.
Original language | English (US) |
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Pages (from-to) | 3497-3503 |
Number of pages | 7 |
Journal | Journal of Applied Physics |
Volume | 90 |
Issue number | 7 |
DOIs | |
State | Published - Oct 1 2001 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy