Thermally stimulated relaxation in Fe-doped SrTiO3 systems: I. Single crystals

Wayne Liu, Clive A. Randall

Research output: Contribution to journalArticle

84 Scopus citations

Abstract

Thermally stimulated depolarization current (TSDC) measurements were carried out on 0.1% and 1% iron (Fe)-doped SrTiO3 crystals to study various effects that are not detected from other electrical characterization methods such as impedance spectroscopy. Using this TSDC technique, the origins of different relaxations in Fe-doped SrTiO3 crystals were identified, and activation energy of the orientated dipole, energy depth of trap site, and trap density in the polarized samples were then estimated from TSDC measurements. From the resulting activation energy of 0.65±0.08 eV of trap charges, these traps are assigned to oxygen vacancy-iron defect complexes. The high-temperature peak at temperature ∼190°C is assigned to the relaxation current of oxygen vacancies and the calculated activation energy of 0.91±0.05 eV is in good agreement with the literature data.

Original languageEnglish (US)
Pages (from-to)3245-3250
Number of pages6
JournalJournal of the American Ceramic Society
Volume91
Issue number10
DOIs
StatePublished - Oct 1 2008

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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