Conduction peaking at phase transitions of as-grown insulating BaTiO 3 single crystals

Hirotaka Yoshioka, Yosuke Urakami, Yukio Watanabe

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We have measured DC current-voltage characteristics of undoped semiinsulating BaTiO3 single crystals and found that the dc conductance defined by the measurements peaks at all three ferroelectric phase transitions of BaTiO3. The peaks are evident in crystals that possess a low coercive field EC and have, in most cases, the spontaneous polarization component perpendicular to the surface. The conductance of the crystals is typically 1 nΩ-1cm-1 at the peak of the paraelectric-ferroelectric transition and exhibits a temperature dependence different from the thermal-activation type. The present study proves that the observed peaking represents a real carrier-conduction anomaly. This anomaly can be a manifestation of a new liquid-like state of electron polarization at phase transitions.

Original languageEnglish
Pages (from-to)198-201
Number of pages4
JournalJournal of the Korean Physical Society
Volume46
Issue number1
Publication statusPublished - Jan 1 2005

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conduction
single crystals
anomalies
polarization
crystals
direct current
activation
temperature dependence
electric potential
liquids
electrons

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Conduction peaking at phase transitions of as-grown insulating BaTiO 3 single crystals. / Yoshioka, Hirotaka; Urakami, Yosuke; Watanabe, Yukio.

In: Journal of the Korean Physical Society, Vol. 46, No. 1, 01.01.2005, p. 198-201.

Research output: Contribution to journalArticle

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