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Your apparatus of polarization measurement doesn't take into account of the leakage current (due to the resistive part of the measured current). To obtain a good cycle (I mean valuable datas), the currents due to the capacitance and resistance of the film must be extracted from the total current. Effectively, P-E cycles must be corrected in case of conductive samples (under high electric fields) to present a "good" cycle.
>See the works of Pr Waser on this subject.
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hawkchai

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TJ30(½ð±Ò+10):лл£¬Ï£ÍûÄÜÓÐÓá£~~ 2010-07-23 12:18:28
TJ30(½ð±Ò+10):ÊÕµ½ÎÄÏ×£¬Ð»Ð»¡£ 2010-07-24 00:31:44
»òÐíÊÇR. Waser. ²»¹ý¶ÔÓÚcorrection, ÎÒ¿ÉÒÔÍÆ¼öһƪÎÄÕÂ: Numerical Extraction of the True Ferroelectric Polarization Due to Switching Domains from Hysteresis
Loops Measured Using A Sawyer-Tower Circuit, Ferroelectrics, 2002, Vol. 274, pp. 165¨C181, »òÕßÁíÍâһƪ: Software compensation to the hysteresis loops of
samples with high dielectric loss and high linear capacitor, ferroelectrics, 2001. Vol. 259. pp, 55-60

[ Last edited by hawkchai on 2010-7-23 at 00:58 ]
2Â¥2010-07-22 23:31:21
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TJ30

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Originally posted by hawkchai at 2010-07-22 23:31:21:
»òÐíÊÇR. Waser. ²»¹ý¶ÔÓÚcorrection, ÎÒ¿ÉÒÔÍÆ¼öһƪÎÄÕÂ: Numerical Extraction of the True Ferroelectric Polarization Due to Switching Domains from Hysteresis
Loops Measured Using A Sawyer-Tower Cir ...

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3Â¥2010-07-23 12:19:23
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ljl8209

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