Physics – Condensed Matter – Superconductivity
Scientific paper
2011-03-02
Supercond. Sci. Technol. 24, 105002 (2011)
Physics
Condensed Matter
Superconductivity
19 pages, 6 figures
Scientific paper
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.
Deguchi Keita
Kawasaki Yasuna
Kumakura Hiroaki
Mizuguchi Yoshikazu
Ozaki Toshinori
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