Electrical Properties of the Surface Layer Formed on the Nb-Doped SrTiO3 Single Crystal

L. Q. Han, N. Iizawa, Y. Chiba, T. Yoneta, A. Kaimai, K. Yashiro, H. Yugami, Y. Nigara, T. Kawada, J. Mizusaki

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

The electrical properties of the surface layer formed on Sr (Ti 0.999 Nb0.001) O3 single crystal were investigated as a function of oxygen partial pressure and temperature. At room temperature, a high resistive layer was found on the surface of the single crystal with thickness of about 10 μm after annealing in the air. The resistance of the surface layer is high and insensitive to Po2 in oxidizing atmospheres, but decreased quickly with decreasing Po2 in reduced atmospheres at elevated temperature. The resistance decreased when temperature increased up to 1200°C. The fitted activation energy of conduction is about 1.62 eV within log Po2 range from -4.0 to -0.1 below 800°C. This value is near reported activation energy of conduction of the grain boundary in SrTiO3.

Original languageEnglish
Pages (from-to)29-42
Number of pages14
JournalKey Engineering Materials
Volume253
Publication statusPublished - 2003 Jan 1
EventCeramic Interfaces: Properties and Applications V - Proceedings of the 5th International Workshop on Interfaces of Ceramic Materials - Tsukuba, Ibaraki, Japan
Duration: 2001 Oct 212001 Oct 25

Keywords

  • Electrical Resistance
  • Single Crystals
  • SrTiO
  • Surface Layer

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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