Electrical conductivity measurements of periclase under high pressure and high temperature

Xiaoping Wu, Baohua Zhang, Junshan Xu, Tomoo Katsura, Shuangmeng Zhai, Takashi Yoshino, Geeth Manthilake, Anton Shatskiy

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The electrical conductivity of sintered polycrystalline periclase has been measured at 20 GPa and temperatures up to 1700 K with a KAWAI-type multi-anvil apparatus. Arrhenius plot of the electrical conductivity shows two linear regions, implying a change of charge transport mechanism with temperature in this experiment. At temperatures below 700 K small polaron conduction dominates, with an activation energy of 0.2 eV. At higher temperatures, the activation energy is determined to be 1.18 eV, which is much higher than 0.2 eV at low temperature. Our observations suggest the high-temperature conduction is attributed to a large polaron process with magnesium vacancy trapping hole on oxygen.

Original languageEnglish
Pages (from-to)53-56
Number of pages4
JournalPhysica B: Condensed Matter
Volume405
Issue number1
DOIs
Publication statusPublished - Jan 1 2010

Keywords

  • Electrical conductivity
  • Ionic conduction
  • Large polaron
  • Periclase

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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