Parallel Critical Field in Thin Niobium Films: Comparison to Theory
| Autor: | P. R. Broussard |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Superconductivity
Physics Condensed matter physics Condensed Matter - Superconductivity Niobium FOS: Physical sciences chemistry.chemical_element Fermi surface 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Superconductivity (cond-mat.supr-con) chemistry 0103 physical sciences General Materials Science 010306 general physics 0210 nano-technology Critical thickness Critical field |
| Zdroj: | Journal of Low Temperature Physics. 189:108-119 |
| ISSN: | 1573-7357 0022-2291 |
| DOI: | 10.1007/s10909-017-1792-0 |
| Popis: | For the first time, a comparison to the predicted behavior for parallel critical field is carried out for the model of Kogan and the model of Hara and Nagai. In this study, thin niobium films in the moderately dirty regime were considered. Experimental values of the $-C_{2}$ term are seen to be lower than those from the model of Hara and Nagai. A possible reason for this could be not including the non spherical Fermi surface of niobium into the model. There is clearly disagreement with the model of Kogan as the films get cleaner and thinner, and two films which should be below his critical thickness still show positive values of $-C_{2}$, in disagreement with his theory. 15 pages, 6 figures, 1 table, submitted to Journal of Low Temperature Physics |
| Databáze: | OpenAIRE |
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