Switching Kinetics

  • James F. Scott
Part of the Springer Series in Advanced Microelectronics book series (MICROELECTR., volume 3)


In principle when a large positive electric field is applied to a ferroelectric material that is in a multidomain state with most domains antiparallel to the applied field (a negative polarization state) the negative domains could all reorient simultaneously and independently. In fact, within Landau theory [250] one can calculate exactly what coercive field would be required in this case. However, the numerical result is typically approximately 1000 times larger than the coercive field observed experimentally. This shows that in practically all cases it is energetically cheaper to switch not by simultaneous polarization within a domain but rather by moving the domain walls. With one exception — the switching of ultrathin 0.9 nm films of polyvinylidenetetrafluoro-ethylene copolymer Langmuir—Blodgett films [251] , which appears to be true Landau theory simultaneous polarization flipping — all ferroelectrics at achievable field strengths E appear to switch by moving domain walls.


Domain Wall Switching Time Coercive Field Ferroelectric Film Nucleation Time 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • James F. Scott
    • 1
  1. 1.Centre for Ferroics, Earth Sciences Dept.Cambridge UniversityCambridgeEngland

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