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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Publicado:	2013
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:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00189464_v49_n8_p4643_Chiliotte http://hdl.handle.net/20.500.12110/paper_00189464_v49_n8_p4643_Chiliotte
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00189464_v49_n8_p4643_Chiliotte
record_format	dspace
spelling	paper:paper_00189464_v49_n8_p4643_Chiliotte2023-06-08T14:40:08Z Low temperature vortex dynamics in superconducting Nb films containing square and rectangular arrays of Ni nanodots 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. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00189464_v49_n8_p4643_Chiliotte 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 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.
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
publishDate	2013
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00189464_v49_n8_p4643_Chiliotte http://hdl.handle.net/20.500.12110/paper_00189464_v49_n8_p4643_Chiliotte
_version_	1768542922101227520

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

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