Browsing by Author "Kubart, Jiří"
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- ItemCharakterizace dielektrických vlastností feroelektrických materiálů měřením hysterezní smyčky(Technická Univerzita v Liberci, 2006) Kubart, Jiří; Mokrý, PavelThe measurement of dielectric hysteresis loop plays an important role in the determination of dielectric properties of ferroelectrics. We built an up-to-date experimental setup for displaying the dielectric hysteresis loop and for the determination of its key parameters, which are relevant to the existing theoretical models for ferroelectric thin films. In addition, the experimental setup makes it possible to study the effect of electrode-adjacent passive (dead) layers and leakage currents on the hysteresis loop shape. The experimental setup consists of the charge amplifier and attenuator. Acquired analog data are digitalized in PCI card with A/D converter and fed into PC, where they are processed in LabView. Finally, the accuracy of the experimental setup and the accuracy of acquired data has been calculated and discussed.