DocumentCode :
19325
Title :
Fabrication of 
Superconducting Tapes by a Chemical-Phase-Transformation PIT
Author :
Izawa, Hiroki ; Mizuguchi, Yoshikazu ; Miura, Osuke
Author_Institution :
Dept. of Electr. & Electron. Eng., Tokyo Metropolitan Univ., Hachioji, Japan
Volume :
25
Issue :
3
fYear :
2015
fDate :
Jun-15
Firstpage :
1
Lastpage :
4
Abstract :
We have fabricated monocore superconducting tapes of KxFe2-y(Se1-zSz)2 using a process based on a chemical phase transformation from 112-type KFe(Se1-zSz)2 (nonsuperconducting) to 122-type KxFe2-y(Se1-zSz)2 (superconducting) via a supply of Fe from the Fe sheath by annealing. Transformation of tape core from the 112 type to the 122 type was observed at the annealing temperature above 600°C. The obtained superconducting tape showed superconductivity at 29.1 K. The magnetic Jc of 1.6 × 102 A/cm2 (at 4.2 K and self-field) was obtained for the sample annealed at 625°C for 5 h followed by quenching.
Keywords :
annealing; critical current density (superconductivity); high-temperature superconductors; iron compounds; potassium compounds; quenching (thermal); superconducting tapes; superconducting transitions; 112-type nonsuperconducting-122-type superconducting chemical phase transformation; KxFe2-y(Se1-zSz)2; annealing temperature; chemical-phase-transformation powder-in-tube; critical current density; monocore superconducting tapes; quenching; temperature 29.1 K; temperature 4.2 K; temperature 625 degC; time 5 h; Annealing; Iron; Magnetic cores; Magnetization; Superconducting filaments and wires; Superconducting films; $hbox{K}_{rm x}hbox{Fe}_{2-{rm y}}hbox{Se}_{2}$; Chemical phase transformation; KxFe2-ySe2; chemical phase transformation; iron-based superconductor; superconducting tape;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2014.2366371
Filename :
6940277
Link To Document :
