Microstructure of Partially Melted Filamentary Hg1223 Superconductors

Tomoko Goto; Shigenori Hirota; Kazuo Watanabe

doi:10.1023/a:1022527613573

Microstructure of Partially Melted Filamentary Hg1223 Superconductors

Tomoko Goto, Shigenori Hirota, Kazuo Watanabe

High Field Laboratory for Superconducting Materials

Research output: Contribution to journal › Article

Abstract

A microstructure of filamentary Hg1223 superconductor by using CaHgO₂ for a vaporizing material was studied to improve the grain alignment and the transport J_c. A filamentary precursor Ba₂Ca₂Cu₃Re_0.2O_x was fabricated using a solution spinning method and partially melted in an evacuated quartz tube with a pellet of (CaHgO₂)Ba₂CaCu_2.8Re_0.2(CuF ₂)_0.2O_x. The reacted sample was a single phase of Hg1223 with T_c value of 135 K. Platelike grains were partly aligned along the fiber length by controlling the heating condition. The J_c value of the sample enhanced by using CaHgO₂ in stead of HgO for the vaporizing material. Although the J_c value rapidly decreased by applying the field less than 0.1 T, the superconductivity at 77 K of the sample maintained in the field up to 8T.

Original language	English
Pages (from-to)	975-979
Number of pages	5
Journal	Journal of Low Temperature Physics
Volume	117
Issue number	3-4
DOIs	https://doi.org/10.1023/a:1022527613573
Publication status	Published - 1999

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Materials Science(all)
Condensed Matter Physics

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Goto, T., Hirota, S., & Watanabe, K. (1999). Microstructure of Partially Melted Filamentary Hg1223 Superconductors. Journal of Low Temperature Physics, 117(3-4), 975-979. https://doi.org/10.1023/a:1022527613573

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abstract = "A microstructure of filamentary Hg1223 superconductor by using CaHgO2 for a vaporizing material was studied to improve the grain alignment and the transport Jc. A filamentary precursor Ba2Ca2Cu3Re0.2Ox was fabricated using a solution spinning method and partially melted in an evacuated quartz tube with a pellet of (CaHgO2)Ba2CaCu2.8Re0.2(CuF 2)0.2Ox. The reacted sample was a single phase of Hg1223 with Tc value of 135 K. Platelike grains were partly aligned along the fiber length by controlling the heating condition. The Jc value of the sample enhanced by using CaHgO2 in stead of HgO for the vaporizing material. Although the Jc value rapidly decreased by applying the field less than 0.1 T, the superconductivity at 77 K of the sample maintained in the field up to 8T.",

author = "Tomoko Goto and Shigenori Hirota and Kazuo Watanabe",

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AB - A microstructure of filamentary Hg1223 superconductor by using CaHgO2 for a vaporizing material was studied to improve the grain alignment and the transport Jc. A filamentary precursor Ba2Ca2Cu3Re0.2Ox was fabricated using a solution spinning method and partially melted in an evacuated quartz tube with a pellet of (CaHgO2)Ba2CaCu2.8Re0.2(CuF 2)0.2Ox. The reacted sample was a single phase of Hg1223 with Tc value of 135 K. Platelike grains were partly aligned along the fiber length by controlling the heating condition. The Jc value of the sample enhanced by using CaHgO2 in stead of HgO for the vaporizing material. Although the Jc value rapidly decreased by applying the field less than 0.1 T, the superconductivity at 77 K of the sample maintained in the field up to 8T.

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