A new route to high-Tc superconducting Bi-Sr-Ca-Cu-O thin films: Improved deposition efficiency and film morphology using ammonia-argon mixtures as the carrier gas

J. M. Zhang; F. DiMeo; B. W. Wessels; D. L. Schulz; T. J. Marks; J. L. Schindler; C. R. Kannewurf

doi:10.1063/1.351052

A new route to high-T_c superconducting Bi-Sr-Ca-Cu-O thin films: Improved deposition efficiency and film morphology using ammonia-argon mixtures as the carrier gas

J. M. Zhang^*, F. DiMeo, B. W. Wessels, D. L. Schulz, T. J. Marks, J. L. Schindler, C. R. Kannewurf

^*Corresponding author for this work

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

20 Scopus citations

Abstract

Highly oriented films of the high-T_c superconductor Bi ₂Sr₂CaCu₂O_x have been prepared by a low-pressure organometallic chemical vapor deposition process using a mixture of ammonia and argon as the carrier gas together with Sr(dpm)₂ (dpm-dipivaloylmethanate), Ca(dpm)₂, Cu(acac)₂ (acac-acetylacetonate), and triphenylbismuth as the organometallic precursors. By introducing ammonia into the carrier gas, a significant improvement in the volatility and thermal stability of both Sr(dpm)₂ and Ca(dpm) ₂ is observed. Typical required source temperatures for Sr(dpm) ₂ and Ca(dpm)₂ with the introduction of ammonia are about 40-50°C lower than the source temperatures of the precursors without the introduction of ammonia. Enhancement of source volatility for Cu(acac) ₂ is also observed. After annealing at 865°C in flowing oxygen, the films consist predominantly of the Bi₂Sr₂CaCu ₂O_x phase and exhibit high preferential orientation of the crystallite c axes perpendicular to the substrate surface. Four-probe resistivity measurements indicate the onset of film superconductivity at ∼110 K and zero resistivity achieved at 74 K.

Original language	English (US)
Pages (from-to)	2769-2771
Number of pages	3
Journal	Journal of Applied Physics
Volume	71
Issue number	6
DOIs	https://doi.org/10.1063/1.351052
State	Published - 1992

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General Physics and Astronomy

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@article{4c5e6402cfa8417cb75b3ace964d805c,

title = "A new route to high-Tc superconducting Bi-Sr-Ca-Cu-O thin films: Improved deposition efficiency and film morphology using ammonia-argon mixtures as the carrier gas",

abstract = "Highly oriented films of the high-Tc superconductor Bi 2Sr2CaCu2Ox have been prepared by a low-pressure organometallic chemical vapor deposition process using a mixture of ammonia and argon as the carrier gas together with Sr(dpm)2 (dpm-dipivaloylmethanate), Ca(dpm)2, Cu(acac)2 (acac-acetylacetonate), and triphenylbismuth as the organometallic precursors. By introducing ammonia into the carrier gas, a significant improvement in the volatility and thermal stability of both Sr(dpm)2 and Ca(dpm) 2 is observed. Typical required source temperatures for Sr(dpm) 2 and Ca(dpm)2 with the introduction of ammonia are about 40-50°C lower than the source temperatures of the precursors without the introduction of ammonia. Enhancement of source volatility for Cu(acac) 2 is also observed. After annealing at 865°C in flowing oxygen, the films consist predominantly of the Bi2Sr2CaCu 2Ox phase and exhibit high preferential orientation of the crystallite c axes perpendicular to the substrate surface. Four-probe resistivity measurements indicate the onset of film superconductivity at ∼110 K and zero resistivity achieved at 74 K.",

author = "Zhang, {J. M.} and F. DiMeo and Wessels, {B. W.} and Schulz, {D. L.} and Marks, {T. J.} and Schindler, {J. L.} and Kannewurf, {C. R.}",

year = "1992",

doi = "10.1063/1.351052",

language = "English (US)",

volume = "71",

pages = "2769--2771",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

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T1 - A new route to high-Tc superconducting Bi-Sr-Ca-Cu-O thin films

T2 - Improved deposition efficiency and film morphology using ammonia-argon mixtures as the carrier gas

AU - Zhang, J. M.

AU - DiMeo, F.

AU - Wessels, B. W.

AU - Schulz, D. L.

AU - Marks, T. J.

AU - Schindler, J. L.

AU - Kannewurf, C. R.

PY - 1992

Y1 - 1992

N2 - Highly oriented films of the high-Tc superconductor Bi 2Sr2CaCu2Ox have been prepared by a low-pressure organometallic chemical vapor deposition process using a mixture of ammonia and argon as the carrier gas together with Sr(dpm)2 (dpm-dipivaloylmethanate), Ca(dpm)2, Cu(acac)2 (acac-acetylacetonate), and triphenylbismuth as the organometallic precursors. By introducing ammonia into the carrier gas, a significant improvement in the volatility and thermal stability of both Sr(dpm)2 and Ca(dpm) 2 is observed. Typical required source temperatures for Sr(dpm) 2 and Ca(dpm)2 with the introduction of ammonia are about 40-50°C lower than the source temperatures of the precursors without the introduction of ammonia. Enhancement of source volatility for Cu(acac) 2 is also observed. After annealing at 865°C in flowing oxygen, the films consist predominantly of the Bi2Sr2CaCu 2Ox phase and exhibit high preferential orientation of the crystallite c axes perpendicular to the substrate surface. Four-probe resistivity measurements indicate the onset of film superconductivity at ∼110 K and zero resistivity achieved at 74 K.

AB - Highly oriented films of the high-Tc superconductor Bi 2Sr2CaCu2Ox have been prepared by a low-pressure organometallic chemical vapor deposition process using a mixture of ammonia and argon as the carrier gas together with Sr(dpm)2 (dpm-dipivaloylmethanate), Ca(dpm)2, Cu(acac)2 (acac-acetylacetonate), and triphenylbismuth as the organometallic precursors. By introducing ammonia into the carrier gas, a significant improvement in the volatility and thermal stability of both Sr(dpm)2 and Ca(dpm) 2 is observed. Typical required source temperatures for Sr(dpm) 2 and Ca(dpm)2 with the introduction of ammonia are about 40-50°C lower than the source temperatures of the precursors without the introduction of ammonia. Enhancement of source volatility for Cu(acac) 2 is also observed. After annealing at 865°C in flowing oxygen, the films consist predominantly of the Bi2Sr2CaCu 2Ox phase and exhibit high preferential orientation of the crystallite c axes perpendicular to the substrate surface. Four-probe resistivity measurements indicate the onset of film superconductivity at ∼110 K and zero resistivity achieved at 74 K.

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A new route to high-T_c superconducting Bi-Sr-Ca-Cu-O thin films: Improved deposition efficiency and film morphology using ammonia-argon mixtures as the carrier gas

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