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

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)100-105
頁數6
期刊Materials Science and Engineering B
56
發行號2-3
DOIs
出版狀態Published - 1998 11月 6

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)
  • 凝聚態物理學
  • 材料力學
  • 機械工業

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