Flux Pinning Properties in YBCO Thin Films With Self-Aligned Magnetic Nanoparticles
| Autor: | Yuanyuan Zhu, Li Chen, Chen-Fong Tsai, Haiyan Wang |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Materials science
High-temperature superconductivity Nanocomposite Flux pinning Nanoparticle Nanotechnology Yttrium barium copper oxide Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention Pulsed laser deposition chemistry.chemical_compound chemistry law Magnetic nanoparticles Electrical and Electronic Engineering Thin film Composite material |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 21:2749-2752 |
| ISSN: | 1558-2515 1051-8223 |
| DOI: | 10.1109/tasc.2010.2090633 |
| Popis: | In this work, we conducted a systematic investigation on both self-field and in-field performance of YBa2Cu3O7-δ (YBCO) thin films with self-aligned (ordered) Fe2O3 magnetic nanoparticles and compared with a pure YBCO reference sample. The doping architectures include YBCO films with ordered Fe2O3 nanoparticles on the top, Fe2O3:CeO2 nanocomposite on the top, with self-aligned Fe2O3 nanoparticles at the bottom and with multilayered nanoparticles in the matrix. All samples were prepared by pulse laser deposition (PLD). We explored the self-field and in-field performance (Jcsf and Jcin-field(H//c)) of the YBCO films with the vibrating sample magnetometer (VSM) in a physical property measurement system (PPMS) at various temperatures and correlated with their microstructural characteristics. This work suggests that the self-aligned Fe2O3 nanoparticles can form in YBCO matrix without severe deterioration of YBCO superconducting properties. Instead, they work as effective pinning centers at all temperatures measured and the multilayer sample and the sample with Fe2O3 : CeO2 nanocomposite show the best pinning properties among all the samples examined. |
| Databáze: | OpenAIRE |
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