Electrode size effect on switching time of SrBi2Ta2O9thin films

Xiaobing Chen, Feng Yan, Chunhua Li, Di Wu, Jinsong Zhu, Yening Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

The polarization switching properties of SrBi2Ta2O9(SBT) thin-film capacitors with different areas of the top electrode in a range of 7.85×10-5- 7.85×10-3cm2were studied by traditional integration method. The switching time of the SBT thin films increases rapidly with increasing top electrode area. To clarify its origin, the capacitance of the samples was measured and various external loads of the measuring circuit were tested. It is found that the switching time increasing is proportional to the capacitance increasing as the top electrode area increases. During the switching measurement the "real" capacitance of the thin film is much larger because of the polarization reversal and causes a larger delay of charge delivery from the voltage source to the thin film. Thus in the case of large top electrode area, the real characteristic time is dominant, leading to a significant size effect on switching time.
Original languageEnglish
Pages (from-to)215-220
Number of pages6
JournalIntegrated Ferroelectrics
Volume46
DOIs
Publication statusPublished - 1 Jan 2002
Externally publishedYes

Keywords

  • Polarization switching
  • SBT thin films
  • Size effect
  • Switching time

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Control and Systems Engineering
  • Ceramics and Composites
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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