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We report on extensive domain wall motion in ferroelectric nanocapacitorarrays investigated by piezoresponse force microscopy. Under a much longer orhigher bias voltage pulse, compared to typical switching pulse conditions,domain walls start to propagate into the neighbouring capacitors initiating asignificant cross-talk. The propagation paths and the propagated area into theneighbouring capacitors were always the same under repeated runs. Theexperimental and the simulated results show that the observed cross-talk isrelated to the capacitor parameters combined with local defects. The resultscan be helpful to test the reliability of nanoscale ferroelectric memorydevices.

Cross talk by extensive domain wall motion in arrays of ferroelectric nanocapacitors