期刊
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
卷 553, 期 -, 页码 26-32出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physc.2018.07.004
关键词
Superconductor; Pinning; Lattice parameter; Critical current; Elastic Mismatch strain
资金
- Office of Naval Research award [N00014-14-1-0182]
- Advanced Research Projects Agency-Energy (ARPA-e) award [DE-AR0000196]
The relation between the c-axis lattice parameter of REBa2Cu3O7-delta (REBCO and RE = Gd, Y) superconductors with 25 mol.% Zr addition and the critical current density (J(c)) was determined at (77 K, 0 T), (30 K, 3 T (B parallel to c)), and (30 K, 9 T (B parallel to c)). In this work, heavily doped Zr-added REBCO films with the thickness of 0.9 mu m were fabricated by metal organic chemical vapor deposition (MOCVD) using a roll-to roll process. An increase in REBCO c-axis lattice parameter and a decrease in elastic mismatch strain relative to self-assembled BZO nanocolumns were observed with increasing (Ba + Zr)/Cu content. The optimum c-axis lattice parameter for achieving the highest J(c), in magnetic field was found to be temperature and field dependent, with optimum values of 11.74, 11.76 and 11.78 A at (77 K, 0 T), (30 K, 3 T (B parallel to c)), and (30 K, 9 T (B parallel to c)), respectively.
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