Single grain boundary characterization of Nb-doped SrTiO3 bicrystals using ac four-point impedance spectroscopy

Jin Ha Hwang*, Kevin D. Johnson, Thomas O Mason, Vinayak P Dravid

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


AC four-point impedance spectroscopy has been applied to Nb-doped SrTiO3 bicrystals. Due to the simplified geometry and highly conductive bulk of the bicrystal, the reference impedance of the electrode was significantly reduced, validating the applicability of ac four-point impedance spectroscopy for electroceramics. DC current-voltage characteristics without any interference due to electrodes confirmed these ac measurements. Using ac four-point impedance spectroscopy, grain boundary contributions are isolated and the corresponding grain boundary thickness and resistivity are estimated.

Original languageEnglish (US)
Pages (from-to)2621-2623
Number of pages3
JournalApplied Physics Letters
Issue number18
StatePublished - May 1 2000

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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