Low temperature vortex dynamics in superconducting Nb films containing square and rectangular arrays of Ni nanodots

We examine the vortex lattice (VL) dynamics in superconducting Nb films containing square and rectangular arrays of Ni nanodots, using ac susceptibility techniques. A remarkable robust feature is the increase in pinning that occurs for magnetic fields that create integer n or half integer flux lines...

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Autores principales: Chiliotte, C.E., Carreira, S.J., Bekeris, V., Gomez, A., Gonzalez, E.M., Prieto, J.L., Vicent, J.L.
Formato: JOUR
Materias:
Artificial flux pinning
Superconducting thin films
Vortex lattice mobility
Ac susceptibility
Critical temperatures
Pinning properties
Rectangular arrays
Superconducting Nb film
Temperature range
Transport experiments
Vortex lattices
Crystal lattices
Magnetic susceptibility
Nickel
Superconductivity
Temperature
Vortex flow
Superconducting films
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00189464_v49_n8_p4643_Chiliotte
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00189464_v49_n8_p4643_Chiliotte2023-10-03T14:16:21Z Low temperature vortex dynamics in superconducting Nb films containing square and rectangular arrays of Ni nanodots Chiliotte, C.E. Carreira, S.J. Bekeris, V. Gomez, A. Gonzalez, E.M. Prieto, J.L. Vicent, J.L. Artificial flux pinning Superconducting thin films Vortex lattice mobility Ac susceptibility Critical temperatures Pinning properties Rectangular arrays Superconducting Nb film Temperature range Transport experiments Vortex lattices Crystal lattices Magnetic susceptibility Nickel Superconductivity Temperature Vortex flow Superconducting films We examine the vortex lattice (VL) dynamics in superconducting Nb films containing square and rectangular arrays of Ni nanodots, using ac susceptibility techniques. A remarkable robust feature is the increase in pinning that occurs for magnetic fields that create integer n or half integer flux lines per pinning cell. This phenomenology has been reported in transport experiments performed very close to the sample critical temperature TC. In our contactless experiments we determined vortex mobility and pinning properties in an extended temperature range 0.65 < T/TC < 0.99. This was possible after growing larger samples, in the square millimeters range, with top down techniques. For the square pinning array, matching up to n = 8 was observed and pinning for n = 3, 4 and 5 show different characteristics, in agreement with published simulations. For the rectangular array, some of the matching orders are missing and we do not find clear evidence of a reconfiguration transition, where vortex commensuration changes from a rectangular cell to a square cell, as reported near TC in earlier transport experiments. © 1965-2012 IEEE. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00189464_v49_n8_p4643_Chiliotte
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Artificial flux pinning
Superconducting thin films
Vortex lattice mobility
Ac susceptibility
Critical temperatures
Pinning properties
Rectangular arrays
Superconducting Nb film
Temperature range
Transport experiments
Vortex lattices
Crystal lattices
Magnetic susceptibility
Nickel
Superconductivity
Temperature
Vortex flow
Superconducting films
spellingShingle Artificial flux pinning
Superconducting thin films
Vortex lattice mobility
Ac susceptibility
Critical temperatures
Pinning properties
Rectangular arrays
Superconducting Nb film
Temperature range
Transport experiments
Vortex lattices
Crystal lattices
Magnetic susceptibility
Nickel
Superconductivity
Temperature
Vortex flow
Superconducting films
Chiliotte, C.E.
Carreira, S.J.
Bekeris, V.
Gomez, A.
Gonzalez, E.M.
Prieto, J.L.
Vicent, J.L.
Low temperature vortex dynamics in superconducting Nb films containing square and rectangular arrays of Ni nanodots
topic_facet Artificial flux pinning
Superconducting thin films
Vortex lattice mobility
Ac susceptibility
Critical temperatures
Pinning properties
Rectangular arrays
Superconducting Nb film
Temperature range
Transport experiments
Vortex lattices
Crystal lattices
Magnetic susceptibility
Nickel
Superconductivity
Temperature
Vortex flow
Superconducting films
description We examine the vortex lattice (VL) dynamics in superconducting Nb films containing square and rectangular arrays of Ni nanodots, using ac susceptibility techniques. A remarkable robust feature is the increase in pinning that occurs for magnetic fields that create integer n or half integer flux lines per pinning cell. This phenomenology has been reported in transport experiments performed very close to the sample critical temperature TC. In our contactless experiments we determined vortex mobility and pinning properties in an extended temperature range 0.65 < T/TC < 0.99. This was possible after growing larger samples, in the square millimeters range, with top down techniques. For the square pinning array, matching up to n = 8 was observed and pinning for n = 3, 4 and 5 show different characteristics, in agreement with published simulations. For the rectangular array, some of the matching orders are missing and we do not find clear evidence of a reconfiguration transition, where vortex commensuration changes from a rectangular cell to a square cell, as reported near TC in earlier transport experiments. © 1965-2012 IEEE.
format JOUR
author Chiliotte, C.E.
Carreira, S.J.
Bekeris, V.
Gomez, A.
Gonzalez, E.M.
Prieto, J.L.
Vicent, J.L.
author_facet Chiliotte, C.E.
Carreira, S.J.
Bekeris, V.
Gomez, A.
Gonzalez, E.M.
Prieto, J.L.
Vicent, J.L.
author_sort Chiliotte, C.E.
title Low temperature vortex dynamics in superconducting Nb films containing square and rectangular arrays of Ni nanodots
title_short Low temperature vortex dynamics in superconducting Nb films containing square and rectangular arrays of Ni nanodots
title_full Low temperature vortex dynamics in superconducting Nb films containing square and rectangular arrays of Ni nanodots
title_fullStr Low temperature vortex dynamics in superconducting Nb films containing square and rectangular arrays of Ni nanodots
title_full_unstemmed Low temperature vortex dynamics in superconducting Nb films containing square and rectangular arrays of Ni nanodots
title_sort low temperature vortex dynamics in superconducting nb films containing square and rectangular arrays of ni nanodots
url http://hdl.handle.net/20.500.12110/paper_00189464_v49_n8_p4643_Chiliotte
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AT vicentjl lowtemperaturevortexdynamicsinsuperconductingnbfilmscontainingsquareandrectangulararraysofninanodots
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