Highly textured oxypnictide superconducting thin films on metal substrates
| Autor: | Iida, Kazumasa, Kurth, Fritz, Chihara, Masashi, Sumiya, Naoki, Grinenko, Vadim, Ichinose, Ataru, Tsukada, Ichiro, Hänisch, Jens, Matias, Vladimir, Hatano, Takafumi, Holzapfel, Bernhard, Ikuta, Hiroshi |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Appl. Phys. Lett. 105, 172602 (2014) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1063/1.4900931 |
| Popis: | Highly textured NdFeAs(O,F) thin films have been grown on ion beam assisted deposition (IBAD)-MgO/Y2O3/Hastelloy substrates by molecular beam epitaxy. The oxypnictide coated conductors showed a superconducting transition temperature (Tc) of 43 K with a self-field critical current density (Jc) of 7.0 x 104 A/cm2 at 5 K, more than 20 times higher than powder-in-tube processed SmFeAs(O,F) wires. Albeit higher Tc as well as better crystalline quality than Co-doped BaFe2As2 coated conductors, in-field Jc of NdFeAs(O,F) was lower than that of Co-doped BaFe2As2. These results suggest that grain boundaries in oxypnictides reduce Jc significantly compared to that in Co-doped BaFe2As2 and, hence biaxial texture is necessary for high Jc. Comment: 4 pages, 4 figures |
| Databáze: | arXiv |
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