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Li_0.025Na_0.975NbO₃晶体的介电和铁电性质

Dielectric and Ferroelectric Properties of Li_0.025Na_0.975NbO₃ Crystal

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【Author】 ZHANG Peilin1, ZHAO Minglei1, WANG Chunlei1, ZHONG Weilie1, CHEN Huanchu2, SONG Yongyuan(1 School of Physics and microelectronics, Shandong University, Jinan 250100, China;00, China)

【机构】山东大学物理与微电子学院；山东大学晶体材料国家重点实验室；山东大学晶体材料国家重点实验室济南250100；济南250100；济南250100；济南250100；

【摘要】观察了Li0.025Na0.975NbO3晶体的电滞回线,并研究了它在400°C以下的介电温谱和室温时500MHz以下的介电频谱。其介电温谱的峰值在升温和降温时分别出现在380°C和365°C,有明显的热滞,因此其相变属于一级相变。Li0.025Na0.975NbO3晶体在500MHz附近可能存在介电弛豫。更多还原

【Abstract】 The ferroelectric and dielectric properties of Li0025Na0975NbO3 crystal were investigated The remanent polarization and coercive field of Li0025Na0975NbO3 crystal were 25 μC/cm2 and 17 kV/cm, respectively, at 160 °C The dielectric peak of Li0025Na0975NbO3 crystal was found to be 380 °C on heating and 365 °C on cooling, which indicates of a thermal hysteresis of about 15 °C In addition, the relax frequency of Li0025Na0975NbO3 crystal was measured to be about 500 MHz in this experiment更多还原