Attempts to fabricate thick HgPb1223 superconducting films on silver

P. V.P.S.S. Sastry; Y. Li; J. Su; J. Schwartz

doi:10.1016/S0921-4534(00)00154-4

Attempts to fabricate thick HgPb1223 superconducting films on silver

P. V.P.S.S. Sastry, Y. Li, J. Su, J. Schwartz

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

5 Scopus citations

Abstract

The influence of the silver interface on the formation and growth of Hg_0.8Pb_0.2Ba₂Ca₂Cu₃O_y (HgPb1223) superconductor was studied using dip-coated films. The formation of even small amounts of BaCO₃ or (Ba,Ca)PbO₄ during the heat treatment of dip-coated PbBaCaCuO precursor films inhibits their conversion to HgPb1223 in the following reaction with mercury. The heat treated precursor films were reacted in sealed tubes using CaHgO₂ as the mercury source. The temperature window for the processing of thick HgPb1223 films on silver is very narrow due to the lowering of melting temperature of silver to 765 °C after extensive amalgamation during the reaction. The HgPb1223 films reacted at 2-3 °C below the melting temperature exhibited optimum superconducting transition temperature of 135 K. The silver interface was shown to have a positive influence in lowering the reaction temperature and promoting grain growth. The superconducting layer at the silver interface had superior texture and magnetization hysteresis compared to that of the surface.

Original language	English (US)
Pages (from-to)	112-119
Number of pages	8
Journal	Physica C: Superconductivity and its applications
Volume	335
Issue number	1
DOIs	https://doi.org/10.1016/S0921-4534(00)00154-4
State	Published - Jun 2000

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/S0921-4534(00)00154-4

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title = "Attempts to fabricate thick HgPb1223 superconducting films on silver",

abstract = "The influence of the silver interface on the formation and growth of Hg0.8Pb0.2Ba2Ca2Cu3Oy (HgPb1223) superconductor was studied using dip-coated films. The formation of even small amounts of BaCO3 or (Ba,Ca)PbO4 during the heat treatment of dip-coated PbBaCaCuO precursor films inhibits their conversion to HgPb1223 in the following reaction with mercury. The heat treated precursor films were reacted in sealed tubes using CaHgO2 as the mercury source. The temperature window for the processing of thick HgPb1223 films on silver is very narrow due to the lowering of melting temperature of silver to 765 °C after extensive amalgamation during the reaction. The HgPb1223 films reacted at 2-3 °C below the melting temperature exhibited optimum superconducting transition temperature of 135 K. The silver interface was shown to have a positive influence in lowering the reaction temperature and promoting grain growth. The superconducting layer at the silver interface had superior texture and magnetization hysteresis compared to that of the surface.",

author = "Sastry, {P. V.P.S.S.} and Y. Li and J. Su and J. Schwartz",

note = "Funding Information: This work was supported by the National High Magnetic Field Laboratory through the IHRP. We thank Robert Goddard and Ulf Trociewitz for their help with the ESEM and SQUID, respectively. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.",

year = "2000",

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doi = "10.1016/S0921-4534(00)00154-4",

language = "English (US)",

volume = "335",

pages = "112--119",

journal = "Physica C: Superconductivity and its applications",

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T1 - Attempts to fabricate thick HgPb1223 superconducting films on silver

AU - Sastry, P. V.P.S.S.

AU - Li, Y.

AU - Su, J.

AU - Schwartz, J.

N1 - Funding Information: This work was supported by the National High Magnetic Field Laboratory through the IHRP. We thank Robert Goddard and Ulf Trociewitz for their help with the ESEM and SQUID, respectively. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.

PY - 2000/6

Y1 - 2000/6

N2 - The influence of the silver interface on the formation and growth of Hg0.8Pb0.2Ba2Ca2Cu3Oy (HgPb1223) superconductor was studied using dip-coated films. The formation of even small amounts of BaCO3 or (Ba,Ca)PbO4 during the heat treatment of dip-coated PbBaCaCuO precursor films inhibits their conversion to HgPb1223 in the following reaction with mercury. The heat treated precursor films were reacted in sealed tubes using CaHgO2 as the mercury source. The temperature window for the processing of thick HgPb1223 films on silver is very narrow due to the lowering of melting temperature of silver to 765 °C after extensive amalgamation during the reaction. The HgPb1223 films reacted at 2-3 °C below the melting temperature exhibited optimum superconducting transition temperature of 135 K. The silver interface was shown to have a positive influence in lowering the reaction temperature and promoting grain growth. The superconducting layer at the silver interface had superior texture and magnetization hysteresis compared to that of the surface.

AB - The influence of the silver interface on the formation and growth of Hg0.8Pb0.2Ba2Ca2Cu3Oy (HgPb1223) superconductor was studied using dip-coated films. The formation of even small amounts of BaCO3 or (Ba,Ca)PbO4 during the heat treatment of dip-coated PbBaCaCuO precursor films inhibits their conversion to HgPb1223 in the following reaction with mercury. The heat treated precursor films were reacted in sealed tubes using CaHgO2 as the mercury source. The temperature window for the processing of thick HgPb1223 films on silver is very narrow due to the lowering of melting temperature of silver to 765 °C after extensive amalgamation during the reaction. The HgPb1223 films reacted at 2-3 °C below the melting temperature exhibited optimum superconducting transition temperature of 135 K. The silver interface was shown to have a positive influence in lowering the reaction temperature and promoting grain growth. The superconducting layer at the silver interface had superior texture and magnetization hysteresis compared to that of the surface.

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Attempts to fabricate thick HgPb1223 superconducting films on silver

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