Broad Temperature Pinning Study of 15 mol.% Zr-Added (Gd, Y)–Ba–Cu–O MOCVD Coated Conductors
| Autor: | Yimin Chen, Eduard Galstyan, Yuhao Liu, Jan Jaroszynski, Xinbo Hu, Aixia Xu, V. Selvamanickam, Dmytro Abraimov, C Lei, David C. Larbalestier, Goran Majkic, N D Khatri |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Condensed matter physics Rare earth Analytical chemistry Atmospheric temperature range Condensed Matter Physics Electronic Optical and Magnetic Materials Conductor Metal visual_art visual_art.visual_art_medium Nanorod Metalorganic vapour phase epitaxy Electrical and Electronic Engineering Electrical conductor Pinning force |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 25:1-5 |
| ISSN: | 1558-2515 1051-8223 |
| DOI: | 10.1109/tasc.2014.2375231 |
| Popis: | BaZrO3 (BZO) nanocolumns have long been shown to be very effective for raising the pinning force F-p of REBa2Cu3Ox (REBCO, where RE = rare earth) films at high temperatures and recently at low temperatures too. We have successfully incorporated a high density of BZO nanorods into metal organic chemical vapor deposited (MOCVD) REBCO coated conductors via Zr addition. We found that, compared to the 7.5% Zr-added coated conductor, dense BZO nanorod arrays in the 15% Zr-added conductor are effective over the whole temperature range from 77 K down to 4.2 K. We attribute the substantially enhanced J(c) at 30 K to the weak uncorrelated pinning as well as the strong correlated pinning. Meanwhile, by tripling the REBCO layer thickness to similar to 2.8 mu m, the engineering critical current density J(e) at 30 K exceeds J(e) of optimized Nb-Ti wires at 4.2 K. |
| Databáze: | OpenAIRE |
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