Dynamics of nanoscale polarization backswitching in tetragonal lead zirconate titanate thin film

Fu, Desheng; Suzuki, Kazuyuki; Kato, Kazumi; Suzuki, Hisao
March 2003
Applied Physics Letters;3/31/2003, Vol. 82 Issue 13, p2130
Academic Journal
The dynamics of polarization backswitching in highly oriented Pb(Zr[SUB0.3]Ti[SUB0.7])O[SUB3] (PZT) thin films has been studied in nanoscale using piezoresponse scanning force microscopy (SFM). Our measurements reveal that a SFM-written domain with diameter about 200 nm in PZT films loses its polarization through both the sidewise and forward backswitching. Both of these sidewise and forward domain wall motions follow a stretched exponential law. However, the characteristic time Ï„ of forward backswitching are about ten times of that sidewise motion. The time dependence of sidewise domain wall velocity indicates that there is a time dependence of activation energy of the barrier that domain motions encounter.


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