26 research outputs found
Transport properties and microstructure of mono- and seven-core wires of FeSe1-xTex superconductor by Fe-diffusion powder-in-tube method
We report the successful fabrication of mono- and seven-core superconducting
wires of FeSe1-xTex using an in-situ Fe-diffusion process based on the
powder-in-tube (Fe-diffusion PIT) method. The reacted layer in these wires were
found to have composite structure with composition nearly FeSe and FeTe for the
inner and outer layers, although a single layer of composition FeSe0.5Te0.5 was
supposed to be formed. The self-field transport Jc values at 4.2 K were found
to be 226.2 A/cm2 and 100.3 A/cm2 respectively for mono- and seven-core wires.
The Jc's of mono- and seven-core wires dropped rapidly at low fields and then
showed a gradual decrease with increasing magnetic fields. In addition, the
seven-core wire showed higher Jc than the mono-core wire under higher magnetic
fields, indicating that the seven-core wire of FeSe1-xTex superconductor using
Fe-diffusion PIT method is advantageous for the superconducting-wire
application under high magnetic fields.Comment: 19 pages, 6 figure