Domain nucleation and relaxation kinetics in ferroelectric thin films

Ganpule, C. S.; Ganpule, C.S.; Nagarajan, V.; Ogale, S. B.; Ogale, S.B.; Roytburd, A. L.; Roytburd, A.L.; Williams, E. D.; Williams, E.D.; Ramesh, R.
November 2000
Applied Physics Letters;11/13/2000, Vol. 77 Issue 20
Academic Journal
The time-dependent relaxation of the remanent polarization in epitaxial lead zirconate titanate (PbZr[sub 0.2]Ti[sub 0.8]O[sub 3]) ferroelectric thin films, containing a uniform two-dimensional grid of 90° domains (c axis in the plane of the film), is examined using piezoresponse microscopy. The 90° domain walls preferentially nucleate the 180° reverse domains during relaxation, with a significant directional anisotropy. Relaxation occurs through the nucleation and growth of reverse domains, which subsequently coalesce and consume the entire region as a function of time. © 2000 American Institute of Physics.


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