New Bi-cuprate thin films of Bi2(La,Ca)2Can−1CunOz (n=3, 4, 5, 6 and 7) prepared by the laser ablation method
| Autor: | Y Mizokawa, Hiroyuki Sasakura, K Yoshida, Shigeki Tsukui |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Superconductivity
Laser ablation Materials science Annealing (metallurgy) Analytical chemistry Energy Engineering and Power Technology Condensed Matter Physics Electronic Optical and Magnetic Materials Lattice constant Electrical resistivity and conductivity Cuprate Electrical and Electronic Engineering Thin film Stoichiometry |
| Zdroj: | Physica C: Superconductivity. 322:25-30 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/s0921-4534(99)00403-7 |
| Popis: | We have synthesized new layered Bi-cuprate thin films of Bi2(La,Ca)2Can−1CunOz (n=3, 4, 5, 6 and 7) by the laser ablation method. These materials are metastable phases that have not been synthesized by standard solid state reaction method. The lattice parameter c was 36.6, 43.1, 49.4, 56.0 and 62.5 A for the n=3 (2223), n=4 (2234), n=5 (2245), n=6 (2256) and n=7 (2267) phases, respectively. All the films showed semiconductor-like temperature dependence with no trace of superconductivity down to 4.2 K. |
| Databáze: | OpenAIRE |
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