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Dynamic response and hysteresis dispersion scaling of ferroelectric SrBi2Ta2O9 thin films

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5 Author(s)
Pan, B. ; Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, Chinaand International Center for Materials Physics, Chinese Academy of Sciences, Shenyang, China ; Yu, H. ; Wu, D. ; Zhou, X.H.
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The dynamic hysteresis response of ferroelectric SrBi2Ta2O9 thin films versus periodically varying electric field over a frequency range of f=10-1–106Hz and amplitude range of E0=15–158 kV/cm is measured utilizing the Sawyer–Tower method. The dynamic order parameter Q shows anomalous behavior against the field amplitude, and a single-peaked hysteresis dispersion is identified. The field response of hysteresis area in the form of ∝f2/3E02/3 over the low frequency range is evaluated, while the response over the high frequency range takes the form of ∝f-1/3E02. We demonstrate that the hysteresis dispersion spectrum exhibits single-parameter scaling, and predicts a characteristic time for domain reversal that is inversely correlated to the field amplitude. © 2003 American Institute of Physics.

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Applied Physics Letters  (Volume:83 ,  Issue: 7 )