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

doi:10.1016/S0921-5107(98)00247-5

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

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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 YBa₂Cu₃O_7-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 language	English
Pages (from-to)	100-105
Number of pages	6
Journal	Materials Science and Engineering B
Volume	56
Issue number	2-3
DOIs	https://doi.org/10.1016/S0921-5107(98)00247-5
Publication status	Published - 1998 Nov 6

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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@article{82fbd962305c43ff863924d936d55458,

title = "Microscopic structure of SrTiO3 bicrystal boundaries studied with scanning tunneling and atomic force microscopy",

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.",

author = "Jiang, {Q. D.} and Huang, {Z. J.} and A. Brazdeikis and M. Dezaneti and Chen, {C. L.} and P. Jin and Chu, {C. W.} and J. Zegenhagen",

note = "Funding Information: This work is supported in part by NSF Grant No. DMR 95-00625, the T.L.L. Temple Foundation, the John and Rebecca Moores Endowment, and the State of Texas through the Texas Center for Superconductivity at the University of Houston. M. Dezaneti would like to thank the support given by the Brazilian agency CNPq through the process No. 200683/93-4. The authors would also like to thank Y.Y. Xue and R.L. Meng for their helpful discussions and C. Kinalidis for his technical assistance.",

year = "1998",

month = nov,

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doi = "10.1016/S0921-5107(98)00247-5",

language = "English",

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pages = "100--105",

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T1 - Microscopic structure of SrTiO3 bicrystal boundaries studied with scanning tunneling and atomic force microscopy

AU - Jiang, Q. D.

AU - Huang, Z. J.

AU - Brazdeikis, A.

AU - Dezaneti, M.

AU - Chen, C. L.

AU - Jin, P.

AU - Chu, C. W.

AU - Zegenhagen, J.

N1 - Funding Information: This work is supported in part by NSF Grant No. DMR 95-00625, the T.L.L. Temple Foundation, the John and Rebecca Moores Endowment, and the State of Texas through the Texas Center for Superconductivity at the University of Houston. M. Dezaneti would like to thank the support given by the Brazilian agency CNPq through the process No. 200683/93-4. The authors would also like to thank Y.Y. Xue and R.L. Meng for their helpful discussions and C. Kinalidis for his technical assistance.

PY - 1998/11/6

Y1 - 1998/11/6

N2 - 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.

AB - 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.

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

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