Time-dependent space-charge-limited conduction as a possible origin of the polarization offsets observed in compositionally graded ferroelectric films

H. K. Chan, Chi Hang Lam, F. G. Shin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

33 Citations (Scopus)


The effects of free space charges on hysteresis-loop measurement of compositionally graded ferroelectrics were investigated. These effects were quite likely to be responsible for the polarization offsets observed in experiments. An expression for the conduction-current density associated with those free space charges was also derived. The computer simulation of compositionally graded lead zirconate titanate, which was placed in the Sawyer-Tower circuit and driven by an alternating applied voltage, produced shifting of measured hysteresis loops.
Original languageEnglish
Pages (from-to)2665-2671
Number of pages7
JournalJournal of Applied Physics
Issue number5
Publication statusPublished - 1 Mar 2004

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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