Superconducting thallium oxide and mercury oxide films
| Autor: | Judy Z. Wu, Z.W. Xing, Jun Chen, Zhifeng Ren, Raghu N. Bhattacharya, S.X Yang, R.D. Blaugher |
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| Rok vydání: | 2002 |
| Předmět: |
Superconductivity
Materials science Analytical chemistry Oxide Energy Engineering and Power Technology chemistry.chemical_element Condensed Matter Physics Electronic Optical and Magnetic Materials Mercury (element) chemistry.chemical_compound chemistry Zero field Superconducting transition temperature Critical current Electrical and Electronic Engineering Thallium oxide Stoichiometry |
| Zdroj: | Physica C: Superconductivity. 377:327-332 |
| ISSN: | 0921-4534 |
| Popis: | This paper reports on a study to convert electrodeposited Tl-oxide films to Hg-1212 using the cation-exchange process. A two-layer electrodeposition process was used to prepare Tl–Ba–Ca–Cu–O films with Tl-1212 and Tl-2212 stoichiometry. Electrodeposited Tl-films were also deposited with Bi and Sr substituted for the Tl and Ba, respectively and also reacted using cation exchange to attempt formation of Hg-1212. The superconducting transition temperature for the “non-substituted” films improved from 97 to 120 K after the cation-exchange process with a critical current density exceeding 2×106 at 5 K in zero field. The cation-exchange process for the Bi, Sr substituted films appears to be more difficult with no marked improvement in superconducting properties. |
| Databáze: | OpenAIRE |
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