Absence of Superconductivity in the Mixture Y-Ba-Ag-O

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概要

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• In contrast to earlier reports, we find that the mixture Y-Ba-Ag-O does not form a compound "YBa_2Ag_3O_x" in a similar fashion to YBa_2Cu_3O_7 but rather is a combination of Ba-Y-O compounds, silver metal and unreacted starting materials. This mixture shows metallic behaviour, but no superconductivity down to 5 K. The observed metallic behaviour of these samples is almost certainly due to the presence of elemental silver. Electron probe micro-analysis (EPMA) studies show that silver does not react with Y, Ba and Ba_4Y_2O_7 in an oxygen atmosphere. The importance of conjoint EPMA/EDAX (energy dispersive X-ray spectroscopy) and X-ray powder diffraction (XRD) studies is emphasised.

• 社団法人応用物理学会の論文
• 1991-12-15

著者

• Singh K

  Irc In Superconductivity Cambridge University

• Edwards P.p.

  Irc In Superconductivity Cambridge University

• SINGH K.K.

  IRC in Superconductivity, Cambridge University

• HUNNEYBALL P.D.

  IRC in Superconductivity, Cambridge University

• Hunneyball P.d.

  Irc In Superconductivity Cambridge University

関連論文

• Absence of Superconductivity in the Mixture Y-Ba-Ag-O
• Scaling Equation of State for a Bose System

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