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Carreira, S.J.; Chiliotte, C.; Bekeris, V.; Rosen, Y.J.; Monton, C.; Schuller, I.K. "Superconducting heterostructures: From antipinning to pinning potentials" (2014) Superconductor Science and Technology. 27(8)
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Abstract:

We study vortex lattice dynamics in a heterostructure that combines two type-II superconductors: a niobium film and a dense triangular array of submicrometric vanadium (V) pillars. Magnetic ac susceptibility measurements reveal a sudden increase in ac penetration, related to an increase in vortex mobility above a magnetic field H* (T), that decreases linearly with temperature. Additionally, temperature independent matching effects that occur when the number of vortices in the sample is an integer of the number of V pillars, strongly reduce vortex mobility, and were observed for the first and second matching fields, Hand H The angular dependence of H Hnd H* (T) shows that matching is determined by the normal applied field component, while H* (T) is independent of the applied field orientation. This important result identifies H* (T) with the critical field boundary for the normal to superconducting transition of V pillars. Below H* (T) superconducting V pillars repel vortices, and the array becomes an 'antipinning' landscape that is more effective in reducing vortex mobility than the 'pinning' landscape of the normal V sites above . Matching effects are observed both below and above H* (T) implying the presence of ordered vortex configurations for 'antipinning' or 'pinning' arrays. © 2014 IOP Publishing Ltd.

Registro:

Documento: Artículo
Título:Superconducting heterostructures: From antipinning to pinning potentials
Autor:Carreira, S.J.; Chiliotte, C.; Bekeris, V.; Rosen, Y.J.; Monton, C.; Schuller, I.K.
Filiación:Departamento de Física, FCEyN, Universidad de Buenos Aires and IFIBA, Pabellón 1, 1428 Buenos Aires, Argentina
Physics Department, University of California-San Diego, San Digeo, CA 92093-0319, United States
Depto. de Materia Condensada, Centro Atomico Constituyentes, CNEA, Av. Gral Paz 1499 (1650), Partido de San-Martin , Prov. de Buenos Aires, Argentina
Laboratory for Physical Sciences, College Park, MD 20740, United States
Palabras clave:heterostructure; superconductor; type II; Crystal lattices; Heterojunctions; Magnetic susceptibility; Solids; Superconducting films; Superconducting materials; Vortex flow; Ac-susceptibility measurements; heterostructure; Superconducting transitions; Temperature independents; Type II; Type II superconductors; Vortex configurations; Vortex lattice dynamics; Superconductivity
Año:2014
Volumen:27
Número:8
DOI: http://dx.doi.org/10.1088/0953-2048/27/8/085007
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_v27_n8_p_Carreira

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Citas:

---------- APA ----------
Carreira, S.J., Chiliotte, C., Bekeris, V., Rosen, Y.J., Monton, C. & Schuller, I.K. (2014) . Superconducting heterostructures: From antipinning to pinning potentials. Superconductor Science and Technology, 27(8).
http://dx.doi.org/10.1088/0953-2048/27/8/085007
---------- CHICAGO ----------
Carreira, S.J., Chiliotte, C., Bekeris, V., Rosen, Y.J., Monton, C., Schuller, I.K. "Superconducting heterostructures: From antipinning to pinning potentials" . Superconductor Science and Technology 27, no. 8 (2014).
http://dx.doi.org/10.1088/0953-2048/27/8/085007
---------- MLA ----------
Carreira, S.J., Chiliotte, C., Bekeris, V., Rosen, Y.J., Monton, C., Schuller, I.K. "Superconducting heterostructures: From antipinning to pinning potentials" . Superconductor Science and Technology, vol. 27, no. 8, 2014.
http://dx.doi.org/10.1088/0953-2048/27/8/085007
---------- VANCOUVER ----------
Carreira, S.J., Chiliotte, C., Bekeris, V., Rosen, Y.J., Monton, C., Schuller, I.K. Superconducting heterostructures: From antipinning to pinning potentials. Supercond Sci Technol. 2014;27(8).
http://dx.doi.org/10.1088/0953-2048/27/8/085007