The electrical resistivity and super-conductivity of some uranium alloys and compounds
| Autor: | John K. Hulm, B.S. Chandrasekhar |
|---|---|
| Rok vydání: | 1958 |
| Předmět: |
Superconductivity
Materials science Condensed matter physics Metallurgy Niobium Intermetallic chemistry.chemical_element General Chemistry Uranium Condensed Matter Physics chemistry Electrical resistivity and conductivity General Materials Science Orthorhombic crystal system Temperature coefficient Phase diagram |
| Zdroj: | Journal of Physics and Chemistry of Solids. 7:259-267 |
| ISSN: | 0022-3697 |
| Popis: | The electrical resistivity and superconductivity of a series of a (orthorhombic) and quenched y (body-centered cubic) binary alloys of uranium with niobium and molybdenum were investigated at temperatures down to 1 °K. Anomalous resistivity behavior occurs in both types of structure. The γ-alloys are particularly unusual in possessing a negative temperature coefficient from room temperature down to the superconducting transition point. Both systems exhibit superconducting transitions, the γ-alloys in the vicinity of 2°K and the α-alloys closer to 1°K. Some success was achieved in a qualitative interpretation of the resistive and superconductive properties of the alloys in terms of a hypothetical band structure of uranium. Ten intermetallic compounds of uranium were also tested for superconductivity down to about 1°K. Four new superconductors were discovered: UCo (1.70°K), U 6 Mn (2.32°K), U 6 Fe (3.86°K) and U 6 Co (2.29°K). The last three compounds are isomorphous and include the first superconducting compounds of manganese and iron. |
| Databáze: | OpenAIRE |
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