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Polarization fatigue in poly(vinylidene fluoride (78%)-trifluoroethylene (22%)) ferroelectric thin films: a pulse train study |
Luo Xiao-Ya(罗晓雅), Zhang Ji-Hao(张吉皓), Yan Xue-Jian(严学俭), and Zhu Guo-Dong(朱国栋)† |
Department of Materials Science, Fudan University, 220 Handan Road, Shanghai 200433, China |
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Abstract This paper investigates the influences of polarization fatigue on remanent polarization and switching time by pulse train measurements in ferroelectric poly(vinylidene fluoride (78%) and trifluoroethylene (22%)) thin films. Fatigue was carried out by a series of bipolar switching pulses with constant pulse width (on-time) and various interval times between pulses (off-time). The experimental observations indicated that the off-time period showed no obvious influence on fatigue rate and the switching time increased with the increase of fatigue cycles. The origination of these phenomena was discussed according to the charge injection model.
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Received: 10 March 2010
Revised: 21 April 2010
Accepted manuscript online:
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PACS:
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73.61.Ph
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(Polymers; organic compounds)
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77.22.Ej
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(Polarization and depolarization)
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77.55.+f
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77.80.Fm
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(Switching phenomena)
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77.84.Jd
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(Polymers; organic compounds)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10804020) and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 200802461088). |
Cite this article:
Luo Xiao-Ya(罗晓雅), Zhang Ji-Hao(张吉皓), Yan Xue-Jian(严学俭), and Zhu Guo-Dong(朱国栋) Polarization fatigue in poly(vinylidene fluoride (78%)-trifluoroethylene (22%)) ferroelectric thin films: a pulse train study 2010 Chin. Phys. B 19 107702
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