Cu-sheathed SmFeAsO1-xFx tapes were fabricated by the ex situ powder-in-tube method. A series of low-temperature (400 °C) hot-pressing process and ordinary sintering process was applied on the tapes, respectively. A transport critical current density (Jc) value of 2.37 × 104 A cm-2 (at 4.2 K and self-field) was achieved in the Cu-sheathed SmFeAsO1-xFx hot-pressed tapes. This is the first time that a large transport Jc is obtained in Cu-sheathed 1111-type wires. The scanning electron microscopy also revealed that the low-temperature hot-pressing technique is effective in preventing the reaction layer between Cu-sheath and superconducting core.
- Fe-based superconductors
- Iron pnictide
- high temperature superconductors
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering