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High temperature dielectric relaxation anomalies in Ca0.9Nd0.1Ti0.9Al0.1O3-delta single crystals

机译:Ca0.9Nd0.1Ti0.9Al0.1O3-δ单晶的高温介电弛豫异常

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摘要

We herein report dielectric studies on Ca0.9Nd0.1Ti0.9Al0.1O3-delta single crystals grown by the optical floating zone technique in the temperature range from room temperature to 660 K. Two dielectric anomalies were observed at similar to 436 K and 520 K, which correspond to relaxor-like behaviour due to Maxwell-Wagner relaxations and conduction relaxation associated with doubly ionized oxygen vacancies respectively. The presence of Ti3+ for charge carrier hopping and oxygen vacancies is confirmed by X-ray photoelectron spectroscopy analysis.
机译:我们在此报告了在室温至660 K的温度范围内通过光学浮区技术生长的Ca0.9Nd0.1Ti0.9Al0.1O3-delta单晶的介电研究。观察到两个介电异常,与436 K和520 K相似分别对应于双离子电离空位的麦克斯韦-瓦格纳弛豫和传导弛豫,分别对应于弛豫样行为。 X射线光电子能谱分析证实了存在Ti3 +用于电荷载流子跳跃和氧空位。

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