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Crystal growth and ferroelectric properties of superlattice-structured Bi_4Ti_3O_(12)-PbBi_4Ti_4O_(15) single crystals

机译:超晶格结构Bi_4Ti_3O_(12)-pbbi_4ti_4o_(15)单晶的晶体生长和铁电性能

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Superlattice-structured Bi_4Ti_3O_(12)- PbBi_4Ti_4O_(15) single crystals were grown, and their properties of polarization hysteresis and leakage current along the a axis were investigated. Oxidation annealing led to a marked increase in leakage current, while annealing in N_2 atmosphere yielded a marked decrease in leakage current at room temperature. These results show that electron hole is the dominant carrier for the leakage current. A well-saturated polarization hysteresis with a remanent polarization of 41 μC/cm~2 was observed, which is suggested to originate from the peculiar ferroelectric displacement of Bi in the Bi_2O_2 layers.
机译:Supertaricate结构的Bi_4Ti_3O_(12) - 生长单晶,并研究了它们的单晶和沿轴沿轴的偏振滞后和漏电流的性质。氧化退火导致泄漏电流的显着增加,同时在N_2大气中退火,在室温下产生显着的漏电流降低。这些结果表明,电子孔是漏电流的主导载体。观察到具有41μC/ cm〜2的常温偏振的良好饱和的偏振滞后,这建议源自Bi _2O_2层中的Bi的特殊铁电位移。

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