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首页> 外文期刊>Chinese science bulletin >Ferroelectricity of weak-polar organic molecules in alternate Langmuir-Blodgett multilayer films
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Ferroelectricity of weak-polar organic molecules in alternate Langmuir-Blodgett multilayer films

机译：交替的Langmuir-Blodgett多层膜中的弱极性有机分子的铁电性

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摘要

Ferroeleclricity in Langmuir-Blodgett (LB) films (Z-type and alternated Y-type) of nitrogencrown (NC) and arachidic acid (AA) was investigated by electric polarization measurements and surface pressure-molecular area (Pi-A) isotherm. For Z-type AA LB multilayer and the AA LB films incorporating barium and manganese ions, as well as for Z-type NC LB multilayer and the Y-type NC/AA alternating LB films, typical hysteresis loops of the samples were observed and confirmed existence of the remnant polarizations in the LB films. Their corresponding remnant polarizations were found to be 15, 180, 650, 450 and 9400 mu C centre dot m~(-2), respectively. Therefore, it was demonstrated that the enhancement of ferroelectricity in the LB films could be createdby incorporation of barium and manganese ions into the LB film structures and strong interaction between alternating monolayers of the samples. These novel approaches can he employed to create strong ferroelectric LB films to make ferroelectric thin-film device for practical applications.
机译：通过电极化测量和表面压力-分子面积（Pi-A）等温线研究了氮冠（NC）和花生酸（AA）的Langmuir-Blodgett（LB）膜（Z型和交替Y型）中的铁电性。对于Z型AA LB多层膜和掺有钡和锰离子的AA LB膜，以及Z型NC LB多层膜和Y型NC / AA交替LB膜，观察到并确认了样品的典型磁滞回线LB膜中存在剩余极化。发现它们对应的剩余极化分别为15、180、650、450和9400μC中心点m〜（-2）。因此，证明了可以通过将钡和锰离子掺入LB膜结构中以及样品的交替单层之间的强相互作用来产生LB膜中铁电性的增强。他可以采用这些新颖的方法来制造坚固的铁电LB膜，从而制造出实用的铁电薄膜器件。

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