Artículo
Urba, L.; Acha, C.; Bekeris, V. "Dissipation mechanisms in granular high Tc superconductors" (1997) Physica C: Superconductivity and its Applications. 279(1-2):95-102
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Abstract:
We have studied the magnetoresistance and I-V characteristics of polycrystalline La2-xSrxCvO4-yCly samples as a function of temperature. Measurements were performed at temperatures near Tc and results were modeled taking into account the effect of thermal fluctuations as proposed by the Ambegaokar-Halperin model, the Anderson-Kim flux creep theory and the collective flux creep model (CFC). At low voltage, sub-ohmic results are better described by the CFC model. We found that the temperature dependence of the critical current density without thermal fluctuations indicates the presence of insulating barriers for non-chlorinated samples and metallic barriers for chlorinated samples. The obtained parameter μ ≃ 0.25 for both samples is, within the CFC model, in agreement with a picture where non-interacting vortices are pinned in a bidimensional defect array. © 1997 Elsevier Science B.V.
Registro:
| Documento: | Artículo |
| Título: | Dissipation mechanisms in granular high Tc superconductors |
| Autor: | Urba, L.; Acha, C.; Bekeris, V. |
| Filiación: | Laboratorio de Bajas Temperaturas, Fac. de Ciencias Exactas y Natureles, Universidad Nacional de Buenos Aires, Pab. I, CP 1428 Buenos Aires, Argentina |
| Palabras clave: | Flux-line lattice; I-V characteristics; Magnetoresistance; Creep; Critical current density (superconductivity); Crystal lattices; Current voltage characteristics; Granular materials; High temperature superconductors; Magnetoresistance; Mathematical models; Polycrystalline materials; Thermal effects; Ambegaokar-Halperin model; Anderson-Kim flux creep theory; Collective flux creep model; Flux line lattices; Oxide superconductors |
| Año: | 1997 |
| Volumen: | 279 |
| Número: | 1-2 |
| Página de inicio: | 95 |
| Página de fin: | 102 |
| DOI: | http://dx.doi.org/10.1016/S0921-4534(97)00168-8 |
| Título revista: | Physica C: Superconductivity and its Applications |
| Título revista abreviado: | Phys C Supercond Appl |
| ISSN: | 09214534 |
| CODEN: | PHYCE |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09214534_v279_n1-2_p95_Urba |
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Citas:
---------- APA ----------
Urba, L., Acha, C. & Bekeris, V. (1997) . Dissipation mechanisms in granular high Tc superconductors. Physica C: Superconductivity and its Applications, 279(1-2), 95-102.http://dx.doi.org/10.1016/S0921-4534(97)00168-8
---------- CHICAGO ----------
Urba, L., Acha, C., Bekeris, V. "Dissipation mechanisms in granular high Tc superconductors" . Physica C: Superconductivity and its Applications 279, no. 1-2 (1997) : 95-102.http://dx.doi.org/10.1016/S0921-4534(97)00168-8
---------- MLA ----------
Urba, L., Acha, C., Bekeris, V. "Dissipation mechanisms in granular high Tc superconductors" . Physica C: Superconductivity and its Applications, vol. 279, no. 1-2, 1997, pp. 95-102.http://dx.doi.org/10.1016/S0921-4534(97)00168-8
---------- VANCOUVER ----------
Urba, L., Acha, C., Bekeris, V. Dissipation mechanisms in granular high Tc superconductors. Phys C Supercond Appl. 1997;279(1-2):95-102.http://dx.doi.org/10.1016/S0921-4534(97)00168-8
