Artículo
Moreno, A.J.; Chiliotte, C.E.; Pasquini, G.; Bekeris, V.; Gomez, A.; Del Valle, J.; Gonzalez, E.M.; Prieto, J.L.; Vicent, J.L. "Anomalies in vortex lattice dynamics driven by induced ac currents in superconducting films with magnetic arrays of two-fold symmetry" (2015) Superconductor Science and Technology. 28(1)
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Abstract:
We study the dynamics of the vortex lattice driven by ac induced currents in the critical state regime, for T>0.70 T C . The samples are superconducting films grown on top of two-fold symmetry array of magnetic dots. In these heterostructures, the induced ac currents flow parallel to the short and to the long side of the pinning array in different areas of the samples simultaneously. This behavior produces remarkable effects in the vortex lattice dynamics. First of all, periodic features are observed in the ac susceptibility versus applied magnetic field measurements which are related to matching effects between the vortex lattices and the magnetic array. However, the vortex lattice reconfiguration observed in magnetotransport experiments is absent. Some of these features are revealed as maxima instead of being minima, indicating higher mobility at certain matching fields. Competing unstable vortex configurations could lead to increase vortex mobility precluding the reconfiguration transition. At high temperatures, where the matching effects show up, the magnetic permeability of the dots is the mechanism that governs the J C (T) behavior. Moreover, the temperature dependence of the pinning force F P (T) shows a temperature crossover related to an unexpected enhancement in vortex mobility. Vortex-vortex interaction and the interplay between trapped and interstitial vortices are a hint to explain these phenomena. © 2015 IOP Publishing Ltd.
Registro:
| Documento: | Artículo |
| Título: | Anomalies in vortex lattice dynamics driven by induced ac currents in superconducting films with magnetic arrays of two-fold symmetry |
| Autor: | Moreno, A.J.; Chiliotte, C.E.; Pasquini, G.; Bekeris, V.; Gomez, A.; Del Valle, J.; Gonzalez, E.M.; Prieto, J.L.; Vicent, J.L. |
| Filiación: | Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Airesand IFIBA CONICET, Buenos Aires, 1428, Argentina Departamento de Física de Materiales, Facultad de CC. Físicas, Universidad Complutense, Madrid, E-28040, Spain IMDEA-Nanociencia, Cantoblanco, Madrid, E-28049, Spain ISOM-ETSIT, Universidad Polite7acute;cnica de Madrid, E-28040 Madrid, Spain |
| Palabras clave: | ac induced currents; superconducting film; two-fold magnetic array; vortex lattice; Critical current density (superconductivity); Lattice vibrations; Magnetic field effects; Magnetic permeability; Magnetic susceptibility; Parallel flow; Superconducting films; Temperature distribution; Ac susceptibility; Applied magnetic fields; Magnetic arrays; Temperature dependence; Vortex configurations; Vortex lattice dynamics; Vortex lattices; Vortex-vortex interaction; Vortex flow |
| Año: | 2015 |
| Volumen: | 28 |
| Número: | 1 |
| DOI: | http://dx.doi.org/10.1088/0953-2048/28/1/015001 |
| Título revista: | Superconductor Science and Technology |
| Título revista abreviado: | Supercond Sci Technol |
| ISSN: | 09532048 |
| CODEN: | SUSTE |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09532048_v28_n1_p_Moreno |
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Citas:
---------- APA ----------
Moreno, A.J., Chiliotte, C.E., Pasquini, G., Bekeris, V., Gomez, A., Del Valle, J., Gonzalez, E.M.,..., Vicent, J.L. (2015) . Anomalies in vortex lattice dynamics driven by induced ac currents in superconducting films with magnetic arrays of two-fold symmetry. Superconductor Science and Technology, 28(1).http://dx.doi.org/10.1088/0953-2048/28/1/015001
---------- CHICAGO ----------
Moreno, A.J., Chiliotte, C.E., Pasquini, G., Bekeris, V., Gomez, A., Del Valle, J., et al. "Anomalies in vortex lattice dynamics driven by induced ac currents in superconducting films with magnetic arrays of two-fold symmetry" . Superconductor Science and Technology 28, no. 1 (2015).http://dx.doi.org/10.1088/0953-2048/28/1/015001
---------- MLA ----------
Moreno, A.J., Chiliotte, C.E., Pasquini, G., Bekeris, V., Gomez, A., Del Valle, J., et al. "Anomalies in vortex lattice dynamics driven by induced ac currents in superconducting films with magnetic arrays of two-fold symmetry" . Superconductor Science and Technology, vol. 28, no. 1, 2015.http://dx.doi.org/10.1088/0953-2048/28/1/015001
---------- VANCOUVER ----------
Moreno, A.J., Chiliotte, C.E., Pasquini, G., Bekeris, V., Gomez, A., Del Valle, J., et al. Anomalies in vortex lattice dynamics driven by induced ac currents in superconducting films with magnetic arrays of two-fold symmetry. Supercond Sci Technol. 2015;28(1).http://dx.doi.org/10.1088/0953-2048/28/1/015001
