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DF: Fachverband Dielektrische Festkörper

DF 5: Scanning and diffraction methods

DF 5.2: Vortrag

Montag, 25. Februar 2008, 15:10–15:30, EB 407

Fourier analysis of ferroelectric polarization reversal — •Andreas Rüdiger — Institute of Solid State Research, Research Center Jülich, Germany

The detection of nanoscale piezoelectricity is generally achieved by means of lock-in techniques. As the excitation voltage exceeds the coercive field, polarization reversal occurs with a complex fourier spectrum that contains information on the piezoelectric response, the electrostriction and the polarization reversal process. A quantitative spectral analysis in comparison to experimental data shows the potential of the method to cover the dynamic range from cantilever to domain wall dynamics.