A nonohmic positive temperature coefficient of resistance in lattice-matched and lattice-mismatched epitaxial BaTiO3 films

Sigeru Kaku, Satoshi Miyauchi, Kazu Yamada, Daisuke Matsumoto, Yukio Watanabe

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We report the finding of two new effects in the current conduction through ferroelectric films: a temperature-induced abrupt conductance change and an effect similar to the positive-temperature-coefficient-of-resistance (PTCR). Here, we use mostly the lattice-mismatched epitaxial heterostructure BaTiO 3 /(La,Sr) 2 CuO 4 . The results should provide an insight into the insulator-metal transition in insulators and the new class of the thin-film PTCR.

Original languageEnglish
Pages (from-to)159-167
Number of pages9
JournalFerroelectrics
Volume335
DOIs
Publication statusPublished - Jul 1 2006

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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