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High velocity vortex channeling in vicinal YBCO thin films

We report on electrical transport measurements at high current densities on optimally doped YBa(2)Cu(3)O(7−δ) thin films grown on vicinal SrTiO(3) substrates. Data were collected by using a pulsed-current technique in a four-probe arrangement, allowing to extend the current–voltage characteristics t...

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Detalles Bibliográficos
Autores principales: Puica, I., Lang, W., Durrell, J.H.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: North-Holland 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3587374/
https://www.ncbi.nlm.nih.gov/pubmed/23482832
http://dx.doi.org/10.1016/j.physc.2011.12.036
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author Puica, I.
Lang, W.
Durrell, J.H.
author_facet Puica, I.
Lang, W.
Durrell, J.H.
author_sort Puica, I.
collection PubMed
description We report on electrical transport measurements at high current densities on optimally doped YBa(2)Cu(3)O(7−δ) thin films grown on vicinal SrTiO(3) substrates. Data were collected by using a pulsed-current technique in a four-probe arrangement, allowing to extend the current–voltage characteristics to high supercritical current densities (up to 24 MA cm(−2)) and high electric fields (more than 20 V/cm), in the superconducting state at temperatures between 30 and 80 K. The electric measurements were performed on tracks perpendicular to the vicinal step direction, such that the current crossed between ab planes, under magnetic field rotated in the plane defined by the crystallographic c axis and the current density. At magnetic field orientation parallel to the cuprate layers, evidence for the sliding motion along the ab planes (vortex channeling) was found. The signature of vortex channeling appeared to get enhanced with increasing electric field, due to the peculiar depinning features in the kinked vortex range. They give rise to a current–voltage characteristics steeper than in the more off-plane rectilinear vortex orientations, in the electric field range below approximately 1 V/cm. Roughly above this value, the high vortex channeling velocities (up to 8.6 km/s) could be ascribed to the flux flow, although the signature of ohmic transport appeared to be altered by unavoidable macroscopic self-heating and hot-electron-like effects.
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spelling pubmed-35873742013-03-06 High velocity vortex channeling in vicinal YBCO thin films Puica, I. Lang, W. Durrell, J.H. Physica C Supercond Article We report on electrical transport measurements at high current densities on optimally doped YBa(2)Cu(3)O(7−δ) thin films grown on vicinal SrTiO(3) substrates. Data were collected by using a pulsed-current technique in a four-probe arrangement, allowing to extend the current–voltage characteristics to high supercritical current densities (up to 24 MA cm(−2)) and high electric fields (more than 20 V/cm), in the superconducting state at temperatures between 30 and 80 K. The electric measurements were performed on tracks perpendicular to the vicinal step direction, such that the current crossed between ab planes, under magnetic field rotated in the plane defined by the crystallographic c axis and the current density. At magnetic field orientation parallel to the cuprate layers, evidence for the sliding motion along the ab planes (vortex channeling) was found. The signature of vortex channeling appeared to get enhanced with increasing electric field, due to the peculiar depinning features in the kinked vortex range. They give rise to a current–voltage characteristics steeper than in the more off-plane rectilinear vortex orientations, in the electric field range below approximately 1 V/cm. Roughly above this value, the high vortex channeling velocities (up to 8.6 km/s) could be ascribed to the flux flow, although the signature of ohmic transport appeared to be altered by unavoidable macroscopic self-heating and hot-electron-like effects. North-Holland 2012-09 /pmc/articles/PMC3587374/ /pubmed/23482832 http://dx.doi.org/10.1016/j.physc.2011.12.036 Text en © 2012 Elsevier B.V. https://creativecommons.org/licenses/by-nc-nd/3.0/ Open Access under CC BY-NC-ND 3.0 (https://creativecommons.org/licenses/by-nc-nd/3.0/) license
spellingShingle Article
Puica, I.
Lang, W.
Durrell, J.H.
High velocity vortex channeling in vicinal YBCO thin films
title High velocity vortex channeling in vicinal YBCO thin films
title_full High velocity vortex channeling in vicinal YBCO thin films
title_fullStr High velocity vortex channeling in vicinal YBCO thin films
title_full_unstemmed High velocity vortex channeling in vicinal YBCO thin films
title_short High velocity vortex channeling in vicinal YBCO thin films
title_sort high velocity vortex channeling in vicinal ybco thin films
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3587374/
https://www.ncbi.nlm.nih.gov/pubmed/23482832
http://dx.doi.org/10.1016/j.physc.2011.12.036
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