The ferroelectric hysteresis loop shows that the ferroelectric-paraelectric phase transition starts at the Curie temperature of the BTO films and continues within a range of temperatures until about the Curie temperature of the bulk BTO material.

• 电滞回线表明铁电-顺电相变开始于BTO薄膜的居里温度,并持续到接近BTO体材料的居里温度。