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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Ferroelectric polarization switching in KNO3: PVDF films
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Ferroelectric polarization switching in KNO3: PVDF films

机译：KNO3：PVDF薄膜中的铁电极化转换

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The ferroelectric behaviour of KNO3 : PVDF composite films was studied. The ferroelectric polarization versus voltage (P-V) and polarization current density versus voltage (J-V) characteristics were simultaneously investigated in 20% KNO3 composite film. The remanent polarization and coercive voltage have been obtained. The frequency dependence of coercive voltage (V-c) shows V-c proportional to f(1), where n approximate to 6.6. The polarization fatigue effect investigations on the composite films gave P-r to be approximately constant up to 4 x 105 cycles. The switching response was studied using square wave signal and Ishibashi and Takagi theory was applied to the switching current transient. The needle like domain growth is believed to be involved in the switching process of the composite films. The effective of voltage and doping per cent of KNO3 (by weight) on switching transients has been also investigated. The effective dimensionality has been found to decrease with doping percentage of KNO3. The switched charges do not show monotonic increase with voltage for the composite films below 50% KNO3 doping level. [References: 28]
机译：研究了KNO3：PVDF复合薄膜的铁电行为。同时在20％KNO3复合薄膜中研究了铁电极化对电压（P-V）和极化电流密度对电压（J-V）的特性。已经获得了剩余极化和矫顽电压。矫顽电压（V-c）的频率依赖性显示V-c与f（1 / n）成正比，其中n约为6.6。对复合薄膜的极化疲劳效应研究表明，P-r在4 x 105周期内近似恒定。使用方波信号研究开关响应，并将Ishibashi和Takagi理论应用于开关电流瞬变。针状畴的生长被认为与复合膜的转换过程有关。还研究了电压和KNO3掺杂百分比（按重量计）对开关瞬变的影响。已经发现有效尺寸随着KNO 3的掺杂百分比而降低。对于低于50％KNO3掺杂水平的复合膜，开关电荷不会显示出随电压的单调增加。 [参考：28]

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