Effects of conversion parameters on the transport properties of YBCO films in the BaF2 ex situ process

J. Yoo; K. J. Leonard; D. F. Lee; H. S. Hsu; L. Heatherly; F. A. List; N. A. Rutter; A. Goyal; M. Paranthaman; D. M. Kroeger

doi:10.1557/JMR.2004.0166

Effects of conversion parameters on the transport properties of YBCO films in the BaF₂ ex situ process

J. Yoo, K. J. Leonard, D. F. Lee, H. S. Hsu, L. Heatherly, F. A. List, N. A. Rutter, A. Goyal, M. Paranthaman, D. M. Kroeger

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

7 Scopus citations

Abstract

The effects of conversion parameters on transport properties of YBa₂Cu₃O_7-δ (YBCO) films on rolling assisted biaxially textured substrates (RABiTS) in the BaF₂ ex situ process were investigated for total pressures P_total between 0.1 and 1.3 atm, water vapor pressures P_H2O between approximately 7 and 70 Torr and processing temperatures T_S between 700 and 790°C. For this study, a 0.3-μm-thick Y-BaF₂-Cu-O precursor film was deposited on a 1-cm-wide Ni = 3 at.% W RABiTS with a buffer layer architecture of CeO₂YSZ/Y₂O₃/Ni deposited in single passes in various reel-to-reel systems for each layer. Under the conditions of P_total = 0.1 atm, T_S = 740°C and P_O2 approximately 150 mTorr, J_C > 2 MA/cm² was obtained at 77 K and self field for P_H2O ≤ 20 Torr. At higher P_H2O (= 70 Torr), however, the maximum attainable J_C decreased. In addition, the J_C at these higher P_H2O dropped rapidly with increased dwell time. The highest J_C, 2.5 MA/cm², was achieved at 730°C with P_total = 0.1 atm and P_H2O approximately 7 Torr. Finally, the variation of I_C with wet conversion time was performed at each processing temperature.

Original language	English
Pages (from-to)	1281-1289
Number of pages	9
Journal	Journal of Materials Research
Volume	19
Issue number	4
DOIs	https://doi.org/10.1557/JMR.2004.0166
State	Published - Apr 2004

Funding

Research sponsored by the United States Department of Energy, Office of Energy Efficiency and Renewable Energy, Office of Distributed Energy and Electric Reliability-Superconductivity Program. This research was performed at the Oak Ridge National Laboratory, managed by UT Battelle, LLC for the U.S. Department of Energy under contract No. DE-AC05-00OR22725. The authors, J. Yoo, K.J. Leonard, and N.A. Rutter are grateful to Oak Ridge Associated Universities for their support. The authors would like to thank David K. Christen for the discussion about the results and wish to thank P.M. Martin for his help with measurements.

Funders	Funder number
Office of Distributed Energy and Electric Reliability-Superconductivity Program
United States Department of Energy
U.S. Department of Energy
Battelle
Office of Energy Efficiency and Renewable Energy

Access to Document

10.1557/JMR.2004.0166

Cite this

@article{b7104d7002fc44809b70adf4b4c558ec,

title = "Effects of conversion parameters on the transport properties of YBCO films in the BaF2 ex situ process",

abstract = "The effects of conversion parameters on transport properties of YBa2Cu3O7-δ (YBCO) films on rolling assisted biaxially textured substrates (RABiTS) in the BaF2 ex situ process were investigated for total pressures Ptotal between 0.1 and 1.3 atm, water vapor pressures PH2O between approximately 7 and 70 Torr and processing temperatures TS between 700 and 790°C. For this study, a 0.3-μm-thick Y-BaF2-Cu-O precursor film was deposited on a 1-cm-wide Ni = 3 at.% W RABiTS with a buffer layer architecture of CeO2YSZ/Y2O3/Ni deposited in single passes in various reel-to-reel systems for each layer. Under the conditions of Ptotal = 0.1 atm, TS = 740°C and PO2 approximately 150 mTorr, JC > 2 MA/cm2 was obtained at 77 K and self field for PH2O ≤ 20 Torr. At higher PH2O (= 70 Torr), however, the maximum attainable JC decreased. In addition, the JC at these higher PH2O dropped rapidly with increased dwell time. The highest JC, 2.5 MA/cm2, was achieved at 730°C with Ptotal = 0.1 atm and PH2O approximately 7 Torr. Finally, the variation of IC with wet conversion time was performed at each processing temperature.",

author = "J. Yoo and Leonard, {K. J.} and Lee, {D. F.} and Hsu, {H. S.} and L. Heatherly and List, {F. A.} and Rutter, {N. A.} and A. Goyal and M. Paranthaman and Kroeger, {D. M.}",

year = "2004",

month = apr,

doi = "10.1557/JMR.2004.0166",

language = "English",

volume = "19",

pages = "1281--1289",

journal = "Journal of Materials Research",

issn = "0884-2914",

publisher = "Springer",

number = "4",

}

TY - JOUR

T1 - Effects of conversion parameters on the transport properties of YBCO films in the BaF2 ex situ process

AU - Yoo, J.

AU - Leonard, K. J.

AU - Lee, D. F.

AU - Hsu, H. S.

AU - Heatherly, L.

AU - List, F. A.

AU - Rutter, N. A.

AU - Goyal, A.

AU - Paranthaman, M.

AU - Kroeger, D. M.

PY - 2004/4

Y1 - 2004/4

N2 - The effects of conversion parameters on transport properties of YBa2Cu3O7-δ (YBCO) films on rolling assisted biaxially textured substrates (RABiTS) in the BaF2 ex situ process were investigated for total pressures Ptotal between 0.1 and 1.3 atm, water vapor pressures PH2O between approximately 7 and 70 Torr and processing temperatures TS between 700 and 790°C. For this study, a 0.3-μm-thick Y-BaF2-Cu-O precursor film was deposited on a 1-cm-wide Ni = 3 at.% W RABiTS with a buffer layer architecture of CeO2YSZ/Y2O3/Ni deposited in single passes in various reel-to-reel systems for each layer. Under the conditions of Ptotal = 0.1 atm, TS = 740°C and PO2 approximately 150 mTorr, JC > 2 MA/cm2 was obtained at 77 K and self field for PH2O ≤ 20 Torr. At higher PH2O (= 70 Torr), however, the maximum attainable JC decreased. In addition, the JC at these higher PH2O dropped rapidly with increased dwell time. The highest JC, 2.5 MA/cm2, was achieved at 730°C with Ptotal = 0.1 atm and PH2O approximately 7 Torr. Finally, the variation of IC with wet conversion time was performed at each processing temperature.

AB - The effects of conversion parameters on transport properties of YBa2Cu3O7-δ (YBCO) films on rolling assisted biaxially textured substrates (RABiTS) in the BaF2 ex situ process were investigated for total pressures Ptotal between 0.1 and 1.3 atm, water vapor pressures PH2O between approximately 7 and 70 Torr and processing temperatures TS between 700 and 790°C. For this study, a 0.3-μm-thick Y-BaF2-Cu-O precursor film was deposited on a 1-cm-wide Ni = 3 at.% W RABiTS with a buffer layer architecture of CeO2YSZ/Y2O3/Ni deposited in single passes in various reel-to-reel systems for each layer. Under the conditions of Ptotal = 0.1 atm, TS = 740°C and PO2 approximately 150 mTorr, JC > 2 MA/cm2 was obtained at 77 K and self field for PH2O ≤ 20 Torr. At higher PH2O (= 70 Torr), however, the maximum attainable JC decreased. In addition, the JC at these higher PH2O dropped rapidly with increased dwell time. The highest JC, 2.5 MA/cm2, was achieved at 730°C with Ptotal = 0.1 atm and PH2O approximately 7 Torr. Finally, the variation of IC with wet conversion time was performed at each processing temperature.

UR - http://www.scopus.com/inward/record.url?scp=2342449249&partnerID=8YFLogxK

U2 - 10.1557/JMR.2004.0166

DO - 10.1557/JMR.2004.0166

M3 - Article

AN - SCOPUS:2342449249

SN - 0884-2914

VL - 19

SP - 1281

EP - 1289

JO - Journal of Materials Research

JF - Journal of Materials Research

IS - 4

ER -

Effects of conversion parameters on the transport properties of YBCO films in the BaF₂ ex situ process

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this