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×î½üͶÁËһƪÎÄÕ£¬Éó¸åÈËÒâ¼ûÓÐÒ»ÌõÍÏÁ˺ܾÃûÓнâ¾öµô£¬¾ÍÊÇÌúµç²âÊÔÖвâÊԵõ½µÄP-E»ØÏßÎÊÌ⣬ËûÒªÎÒ½øÐÐÐÞÕý£¬²¢ÇÒ¿´¿´Pr WaserµÄÎÄÕ£¬µ«ÊÇÎÒûÕÒµ½Õâ¸öÈ˵ÄÏà¹ØÎÄÕ£¬²»Öª¸÷λÓÐÈË¿´¹ýËûÏà¹ØµÄÎÄÕÂû£¿»òÕßÌṩÆäËûÐÞÕýµÄ·½·¨Ò²¿ÉÒÔ¡£ÎÒ×î½üÊÇ¿´ÁËÎÄÕ£ºProcessing effects on the microstructure and ferroelectric properties of strontium bismuth tantalate thin film, µ«ÊÇËûµÄ¼ÆËã·½·¨ºÃÏñÓÐÎÊÌ⣬һֱûÄܼÆËã³öºÏÀíµÄ½á¹û¡£Ð»Ð»¸÷λ°ïæ¡£ ÏÂÃæÊÇÉó¸åÈËÏà¹ØµÄÒâ¼û£º 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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»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 ] |
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4Â¥2010-07-23 12:24:51
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