Enhancement of flux pinning and critical currents in YBa 2 Cu 3 O 7-δ films by nanoscale iridium pretreatment of substrate surfaces

T. Aytug; M. Paranthaman; A. A. Gapud; S. Kang; H. M. Christen; K. J. Leonard; P. M. Martin; J. R. Thompson; D. K. Christen; R. Meng; I. Rusakova; C. W. Chu; T. H. Johansen

doi:10.1063/1.2138370

Enhancement of flux pinning and critical currents in YBa ₂ Cu ₃ O _7-δ films by nanoscale iridium pretreatment of substrate surfaces

T. Aytug
, M. Paranthaman
, A. A. Gapud
, S. Kang
, H. M. Christen
, K. J. Leonard
, P. M. Martin
, J. R. Thompson
, D. K. Christen
, R. Meng
, I. Rusakova
, C. W. Chu
, T. H. Johansen

Nanomaterials Chemistry Group

Research output: Contribution to journal › Article › peer-review

88 Scopus citations

Abstract

We have acquired positive results in a controlled study to investigate the effects of substrate surface modification on the growth-induced flux-pinning nanostructures in YBa2 Cu3 O7-δ (YBCO) films. Nanoscale iridium (Ir) particles were applied to single-crystal SrTiO3 substrate surfaces using dc-magnetron sputtering. Superconducting properties of YBCO films grown on the Ir-modified substrates, measured by transport and magneto-optical imaging, have shown substantial improvement in the critical current densities (Jc) at 77 K over those on untreated, control substrates. Results also show a nearly uniform enhancement of Jc over all orientations of magnetic field. Present results are found to be consistent with cross-sectional transmission electron microscopy investigations. Ultimately, the objective of this approach is to produce enhancements in the properties of coated conductors by a simple pretreatment of the substrate surface.

Original language	English
Article number	114309
Journal	Journal of Applied Physics
Volume	98
Issue number	11
DOIs	https://doi.org/10.1063/1.2138370
State	Published - 2005

Funding

This work was supported by the U.S. Department of Energy, Office of Electricity Distribution and Energy Reliability. The research was performed at the Oak Ridge National Laboratory, managed by U.T.-Battelle, LLC for the USDOE under Contract No. DE-AC05-00OR22725.

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Aytug, T., Paranthaman, M., Gapud, A. A., Kang, S., Christen, H. M., Leonard, K. J., Martin, P. M., Thompson, J. R., Christen, D. K., Meng, R., Rusakova, I., Chu, C. W., & Johansen, T. H. (2005). Enhancement of flux pinning and critical currents in YBa ₂ Cu ₃ O _7-δ films by nanoscale iridium pretreatment of substrate surfaces. Journal of Applied Physics, 98(11), Article 114309. https://doi.org/10.1063/1.2138370

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title = "Enhancement of flux pinning and critical currents in YBa 2 Cu 3 O 7-δ films by nanoscale iridium pretreatment of substrate surfaces",

abstract = "We have acquired positive results in a controlled study to investigate the effects of substrate surface modification on the growth-induced flux-pinning nanostructures in YBa2 Cu3 O7-δ (YBCO) films. Nanoscale iridium (Ir) particles were applied to single-crystal SrTiO3 substrate surfaces using dc-magnetron sputtering. Superconducting properties of YBCO films grown on the Ir-modified substrates, measured by transport and magneto-optical imaging, have shown substantial improvement in the critical current densities (Jc) at 77 K over those on untreated, control substrates. Results also show a nearly uniform enhancement of Jc over all orientations of magnetic field. Present results are found to be consistent with cross-sectional transmission electron microscopy investigations. Ultimately, the objective of this approach is to produce enhancements in the properties of coated conductors by a simple pretreatment of the substrate surface.",

author = "T. Aytug and M. Paranthaman and Gapud, \{A. A.\} and S. Kang and Christen, \{H. M.\} and Leonard, \{K. J.\} and Martin, \{P. M.\} and Thompson, \{J. R.\} and Christen, \{D. K.\} and R. Meng and I. Rusakova and Chu, \{C. W.\} and Johansen, \{T. H.\}",

year = "2005",

doi = "10.1063/1.2138370",

language = "English",

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Aytug, T , Paranthaman, M, Gapud, AA, Kang, S, Christen, HM, Leonard, KJ, Martin, PM, Thompson, JR, Christen, DK, Meng, R, Rusakova, I, Chu, CW & Johansen, TH 2005, 'Enhancement of flux pinning and critical currents in YBa ₂ Cu ₃ O _7-δ films by nanoscale iridium pretreatment of substrate surfaces', Journal of Applied Physics, vol. 98, no. 11, 114309. https://doi.org/10.1063/1.2138370

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T1 - Enhancement of flux pinning and critical currents in YBa 2 Cu 3 O 7-δ films by nanoscale iridium pretreatment of substrate surfaces

AU - Aytug, T.

AU - Paranthaman, M.

AU - Gapud, A. A.

AU - Kang, S.

AU - Christen, H. M.

AU - Leonard, K. J.

AU - Martin, P. M.

AU - Thompson, J. R.

AU - Christen, D. K.

AU - Meng, R.

AU - Rusakova, I.

AU - Chu, C. W.

AU - Johansen, T. H.

PY - 2005

Y1 - 2005

N2 - We have acquired positive results in a controlled study to investigate the effects of substrate surface modification on the growth-induced flux-pinning nanostructures in YBa2 Cu3 O7-δ (YBCO) films. Nanoscale iridium (Ir) particles were applied to single-crystal SrTiO3 substrate surfaces using dc-magnetron sputtering. Superconducting properties of YBCO films grown on the Ir-modified substrates, measured by transport and magneto-optical imaging, have shown substantial improvement in the critical current densities (Jc) at 77 K over those on untreated, control substrates. Results also show a nearly uniform enhancement of Jc over all orientations of magnetic field. Present results are found to be consistent with cross-sectional transmission electron microscopy investigations. Ultimately, the objective of this approach is to produce enhancements in the properties of coated conductors by a simple pretreatment of the substrate surface.

AB - We have acquired positive results in a controlled study to investigate the effects of substrate surface modification on the growth-induced flux-pinning nanostructures in YBa2 Cu3 O7-δ (YBCO) films. Nanoscale iridium (Ir) particles were applied to single-crystal SrTiO3 substrate surfaces using dc-magnetron sputtering. Superconducting properties of YBCO films grown on the Ir-modified substrates, measured by transport and magneto-optical imaging, have shown substantial improvement in the critical current densities (Jc) at 77 K over those on untreated, control substrates. Results also show a nearly uniform enhancement of Jc over all orientations of magnetic field. Present results are found to be consistent with cross-sectional transmission electron microscopy investigations. Ultimately, the objective of this approach is to produce enhancements in the properties of coated conductors by a simple pretreatment of the substrate surface.

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M1 - 114309

ER -

Enhancement of flux pinning and critical currents in YBa ₂ Cu ₃ O _7-δ films by nanoscale iridium pretreatment of substrate surfaces

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