Electro-optic Kerr effect for samples of La-doped PMN-PT at room temperature. (a) Birefringence as a function of electric field for samples of 3/75/25, 4/75/25, and PLZT 9/65/35. (b) Birefringence as a function of the square of electric field.
Dielectric property as a function of temperature and dc bias for La-doped PMN-PT x/75/25 (frequency range: 10−1−103Hz).
Ferroelectric hysteresis (P-E) loop at 10 Hz for La-doped PMN-PT x/75/25 at room temperature.
Current as a function of electric field at the same frequency in (P-E) loop measurement for La-doped PMN-PT x/75/25 at room temperature.
PFM images of ferroelectric domains for different areas of La-doped PMN-PT x/75/25 at room temperature. Measurement unit: µm. (a) 2/75/25, (b) 3/75/25, (c) 4/75/25.
Schematic illustration of domain configuration for La-doped PMN-PT x/75/25. White squares refer to the perovskite cubic lattice, black circles with arrows inside refer to the PNR or polar regions.
Temperature dependence of electro-optic Kerr constant for samples of La-doped PMN-PT after aging for around 1 yr.
Piezoelectric constant as a function of aging time for La-doped PMN-PT x/75/25 poled at dc electric field of 20 kV/cm for 1 min at room temperature.
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