In situ comparison of the critical current density in YBa2Cu3O7− thin films measured by the screening technique under two criteria
In this investigation we report the determination of the critical current density Jc flowing in a YBa2Cu3O7−S superconducting thin film. Estimation of Jc was carried out by an inductive technique, the so-called screening technique, in which both the imaginary part of the fundamental harmonic of susc...
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| Tipo de recurso: | artículo |
| Estado: | Versión enviada para evaluación y publicación |
| Fecha de publicación: | 2013 |
| País: | México |
| Institución: | Centro de Investigación en Materiales Avanzados |
| Repositorio: | Fuente de Objetos Científicos Open Access del CIMAV |
| Idioma: | inglés |
| OAI Identifier: | oai:cimav.repositorioinstitucional.mx:1004/1076 |
| Acceso en línea: | http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1076 |
| Access Level: | acceso abierto |
| Palabra clave: | info:eu-repo/classification/SQUID'S/HTSC info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/22 info:eu-repo/classification/cti/2299 info:eu-repo/classification/cti/229999 |
| Sumario: | In this investigation we report the determination of the critical current density Jc flowing in a YBa2Cu3O7−S superconducting thin film. Estimation of Jc was carried out by an inductive technique, the so-called screening technique, in which both the imaginary part of the fundamental harmonic of susceptibility Xi′ 1 and third harmonic voltage V3 criteria were considered for the determination of the full penetration field. In order to verify the reliability of this technique under two criteria, we investigated the homogeneity of Jc via transport measurements conducted on four microbridges patterned in the same film. Based on the transport method we found that both techniques yield similar results in the determination of Jc for temperatures close to critical temperature Tc. However, at temperatures relatively far from Tc, the V3 criterion showed a better agreement with the transport data. Furthermore, using both criteria, we propose a methodology to estimate in situ the coil factor associated with the V3 criterion, avoiding in this way the need of implementing an additional technique. |
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