Microscopic structure of SrTiO3 bicrystal boundaries studied with scanning tunneling and atomic force microscopy

Q. D. Jiang, Z. J. Huang, A. Brazdeikis, M. Dezaneti, C. L. Chen, P. Jin, C. W. Chu, J. Zegenhagen

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We studied the thermal annealing effects on the micro structure of the grain boundary of a 36.8° and a 24° symmetric [100] tilt SrTiO3 bicrystal. Scanning tunneling microscopy and atomic force microscopy were used for the observation of the vacuum exposed boundary structures. Annealing the bicrystalline substrates at temperatures as low as 780°C led to the formation of grooves at their boundaries. This provides direct evidence that the thickness depression of YBa2Cu3O7-δ films at the bicrystal boundaries originates from the underlying grooved substrates. A simple structural model has been proposed to explain the 1/φ dependence of the normalized critical currents flowing cross the grain boundaries. PACS nos: 61.16.Ch, 61.72.Mm, 68.35.-p, 68.35.Ct, 68.35.

Original languageEnglish
Pages (from-to)100-105
Number of pages6
JournalMaterials Science and Engineering B
Volume56
Issue number2-3
DOIs
Publication statusPublished - 1998 Nov 6

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint

Dive into the research topics of 'Microscopic structure of SrTiO3 bicrystal boundaries studied with scanning tunneling and atomic force microscopy'. Together they form a unique fingerprint.

Cite this