Electrical conductivity of insulating SrTiO3 and LaGaO 3 at phase transitions

Daisuke Matsumoto, Mizuki Yamato, Yousuke Urakami, Yukio Watanabe

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

We have studied the extremely small conductivity of the nominally stoichiometric insulating single crystals LaGaO3and SrTiO3 in the dark. The conductivity of the LaGaO3 and SrTiO3 crystals exhibits activation type temperature dependence. We have found that the conductivity of the LaGaO3 crystal changes at the ferro-elastic-like phase transition. However, unlike the our previous report on the insulating BaTiO3 and relaxor ferroelectric single crystals, the conductivity of both LaGaO3and SrTiO3 crystals do not peak. Therefore, the ferroelectric phase transition or the existence of the spontaneous polarization is essential for the peaking in the conductivity-temperature characteristics to occur.

Original languageEnglish
Pages (from-to)58-61
Number of pages4
JournalFerroelectrics
Volume348
DOIs
Publication statusPublished - 2007
Event8th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity, RCBJSF-8 - Tsukuba, Japan
Duration: May 15 2006May 19 2006

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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