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.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Materials Science(all)
- Condensed Matter Physics