Fabrication and Characteristics of Multi-core Tl-Ba(Sr)-Ca-Cu Oxide Superconducting Tapes
The Tl-Ba(Sr)-Ca-Cu oxide superconducting material (TBSCCO) was formed into single- or multi-core (36- or 1332-core) tapes by means of the Ag-sheathed powder method (the rolling or pressing). The maximum critical transport current density Jc of 5800 A/cm2 was achieved at 77 K and 0 T in a 36 multi-core rolled tape with 0.07 mm thickness. The Ic values of the pressed tapes with single- and 36-core reached 21 and 17 A at 77 K, respectively. It was found that the pressing method improved the Jc of the multi-core tapes in 0-2 T magnetic fields and that there were no indications of difference of Jc values in any direction of the magnetic field.
KeywordsExternal Magnetic Field Critical Current Density Pressing Method Rolled Tape Tape Surface
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