Stabilization of Strontium Analogues of Barium Yttrium Cuprate Perovskites via Chemical Substitution

S. A. Sunshine, Lynn Schneemeyer, T. Siegrist, D. C. Douglass, J. V. Waszczak, R. J. Cava, E. M. Gyorgy, D. W. Murphy

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Abstract

We report the synthesis and characterization of Sr2YCu3-xMxOy, M = Al, Pb, Fe, and Co, analogues of the 92 K superconducting perovskite Ba2YCu3O7. While phase-pure Sr2YCu3O7 cannot be prepared, cation substitution for Cu stabilizes this phase. Crystals of these phases were grown from CuO-rich melts containing appropriate melt impurities or from lead oxide based melts. Ceramic samples were prepared for detailed studies of stability ranges, oxygen content, and property/dopant relationships. For Sr2YCu3-xMxO7+δ, samples with M = Al or Co have δ = 0 for all x and δ > 0 when M = Fe and x ≈ 1. Samples were characterized by resistivity and dc magnetic susceptibility measurements. Superconductivity is observed in samples with low levels of metal substitution; however, the volume fraction is small (<2%) and cannot be uniquely attributed to the perovskite phase. A comparison of solid-state 27Al NMR spectra of Ba- and Sr-based perovskites suggest a different Al environment in these two systems.

Original languageEnglish
Pages (from-to)331-335
Number of pages5
JournalChemistry of Materials
Volume1
Issue number3
DOIs
StatePublished - 1 May 1989

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Yttrium
Strontium
Barium
Perovskite
Substitution reactions
Stabilization
Lead oxide
Superconductivity
Magnetic susceptibility
Cations
Volume fraction
Positive ions
Metals
Doping (additives)
Nuclear magnetic resonance
Impurities
Oxygen
Crystals
perovskite
lead oxide

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Sunshine, S. A., Schneemeyer, L., Siegrist, T., Douglass, D. C., Waszczak, J. V., Cava, R. J., ... Murphy, D. W. (1989). Stabilization of Strontium Analogues of Barium Yttrium Cuprate Perovskites via Chemical Substitution. Chemistry of Materials, 1(3), 331-335. https://doi.org/10.1021/cm00003a011
Sunshine, S. A. ; Schneemeyer, Lynn ; Siegrist, T. ; Douglass, D. C. ; Waszczak, J. V. ; Cava, R. J. ; Gyorgy, E. M. ; Murphy, D. W. / Stabilization of Strontium Analogues of Barium Yttrium Cuprate Perovskites via Chemical Substitution. In: Chemistry of Materials. 1989 ; Vol. 1, No. 3. pp. 331-335.
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abstract = "We report the synthesis and characterization of Sr2YCu3-xMxOy, M = Al, Pb, Fe, and Co, analogues of the 92 K superconducting perovskite Ba2YCu3O7. While phase-pure Sr2YCu3O7 cannot be prepared, cation substitution for Cu stabilizes this phase. Crystals of these phases were grown from CuO-rich melts containing appropriate melt impurities or from lead oxide based melts. Ceramic samples were prepared for detailed studies of stability ranges, oxygen content, and property/dopant relationships. For Sr2YCu3-xMxO7+δ, samples with M = Al or Co have δ = 0 for all x and δ > 0 when M = Fe and x ≈ 1. Samples were characterized by resistivity and dc magnetic susceptibility measurements. Superconductivity is observed in samples with low levels of metal substitution; however, the volume fraction is small (<2{\%}) and cannot be uniquely attributed to the perovskite phase. A comparison of solid-state 27Al NMR spectra of Ba- and Sr-based perovskites suggest a different Al environment in these two systems.",
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Sunshine, SA, Schneemeyer, L, Siegrist, T, Douglass, DC, Waszczak, JV, Cava, RJ, Gyorgy, EM & Murphy, DW 1989, 'Stabilization of Strontium Analogues of Barium Yttrium Cuprate Perovskites via Chemical Substitution', Chemistry of Materials, vol. 1, no. 3, pp. 331-335. https://doi.org/10.1021/cm00003a011

Stabilization of Strontium Analogues of Barium Yttrium Cuprate Perovskites via Chemical Substitution. / Sunshine, S. A.; Schneemeyer, Lynn; Siegrist, T.; Douglass, D. C.; Waszczak, J. V.; Cava, R. J.; Gyorgy, E. M.; Murphy, D. W.

In: Chemistry of Materials, Vol. 1, No. 3, 01.05.1989, p. 331-335.

Research output: Contribution to journalArticle

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T1 - Stabilization of Strontium Analogues of Barium Yttrium Cuprate Perovskites via Chemical Substitution

AU - Sunshine, S. A.

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N2 - We report the synthesis and characterization of Sr2YCu3-xMxOy, M = Al, Pb, Fe, and Co, analogues of the 92 K superconducting perovskite Ba2YCu3O7. While phase-pure Sr2YCu3O7 cannot be prepared, cation substitution for Cu stabilizes this phase. Crystals of these phases were grown from CuO-rich melts containing appropriate melt impurities or from lead oxide based melts. Ceramic samples were prepared for detailed studies of stability ranges, oxygen content, and property/dopant relationships. For Sr2YCu3-xMxO7+δ, samples with M = Al or Co have δ = 0 for all x and δ > 0 when M = Fe and x ≈ 1. Samples were characterized by resistivity and dc magnetic susceptibility measurements. Superconductivity is observed in samples with low levels of metal substitution; however, the volume fraction is small (<2%) and cannot be uniquely attributed to the perovskite phase. A comparison of solid-state 27Al NMR spectra of Ba- and Sr-based perovskites suggest a different Al environment in these two systems.

AB - We report the synthesis and characterization of Sr2YCu3-xMxOy, M = Al, Pb, Fe, and Co, analogues of the 92 K superconducting perovskite Ba2YCu3O7. While phase-pure Sr2YCu3O7 cannot be prepared, cation substitution for Cu stabilizes this phase. Crystals of these phases were grown from CuO-rich melts containing appropriate melt impurities or from lead oxide based melts. Ceramic samples were prepared for detailed studies of stability ranges, oxygen content, and property/dopant relationships. For Sr2YCu3-xMxO7+δ, samples with M = Al or Co have δ = 0 for all x and δ > 0 when M = Fe and x ≈ 1. Samples were characterized by resistivity and dc magnetic susceptibility measurements. Superconductivity is observed in samples with low levels of metal substitution; however, the volume fraction is small (<2%) and cannot be uniquely attributed to the perovskite phase. A comparison of solid-state 27Al NMR spectra of Ba- and Sr-based perovskites suggest a different Al environment in these two systems.

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