Structure and superconductivity studies on Fe and Co doped Bi-2212
| Autor: | G.V. Subba Rao, M. S. Ramachandra Rao, P. Sumana Prabhu |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Superconductivity
chemistry.chemical_classification Materials science High-temperature superconductivity Dopant Analytical chemistry Energy Engineering and Power Technology Condensed Matter Physics Magnetic susceptibility Electronic Optical and Magnetic Materials law.invention Bismuth compounds Ceramic materials Cobalt Iron Bismuth strontium calcium copper oxides Oxide superconductors High temperature superconductors chemistry law Electrical resistivity and conductivity Phase (matter) Electrical and Electronic Engineering Solubility Inorganic compound |
| Zdroj: | Physica C: Superconductivity. 211:279-287 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/0921-4534(93)90134-c |
| Popis: | Systematic studies of the Bi-2212 superconducting phase, substituting at the Cu-site by Fe and Co, have been carried out on an off-stoichiometric composition Bi 2.1 Sr 1.93 Ca 0.97 (Cu 2 − x M x )O 8 + y (M = Fe, Co; 0 ⩽ x ⩽ 0.12 for Fe and 0 ⩽ x ⩽ 0.1 for Co). For the x = 0 phase, T c,zero values in the range 74–76 K have been obtained consistently. X-ray diffraction studies show that the solid solubility exists up to x = 0.12 for M = Fe and x = 0.1 for M = Co. A monotonic decrease in T c with increasing dopant concentration is observed from resistivity as well as AC susceptibility measurements, and the results are discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|