Ce-doped BaTiO3 (BTO) films were grown by pulsed laser deposition. Highly c-axis-oriented BTO:Ce/YBa2Cu3O7−x bilayer structures on a SrTiO3 (100) substrate were fabricated for electrical property characterization. Typical hysteresis and butterfly type C–V plots were observed. The remanent polarization and coercive field are 3 μC/cm2 and 20 kV/cm, respectively. Highly a-axis-oriented Ce-doped and undoped BTO films were also deposited on MgO(100) substrates. Their linear and quadratic electro-optic effects were measured and compared. The Ce-doped films showed a larger linear electro-optic coefficient and obvious hysteresis in the quadratic electro-optic coefficient.
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Liu et al. (1997) studied this question.
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