Oscillatory dynamics of a superconductor vortex lattice in high amplitude ac magnetic fields

We study by ac susceptibility measurements the evolution of the solid vortex lattice mobility under oscillating forces. It has already been shown that in YBCO single crystals, below the melting transition, a temporarily symmetric magnetic ac field (e.g., sinusoidal, square, triangular) can heal the...

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Publicado: 2005
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v71_n13_p_Moreno
http://hdl.handle.net/20.500.12110/paper_10980121_v71_n13_p_Moreno
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_10980121_v71_n13_p_Moreno
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spelling paper:paper_10980121_v71_n13_p_Moreno2023-06-08T16:07:28Z Oscillatory dynamics of a superconductor vortex lattice in high amplitude ac magnetic fields We study by ac susceptibility measurements the evolution of the solid vortex lattice mobility under oscillating forces. It has already been shown that in YBCO single crystals, below the melting transition, a temporarily symmetric magnetic ac field (e.g., sinusoidal, square, triangular) can heal the vortex lattice (VL) and increase its mobility, but a temporarily asymmetric one (e.g., sawtooth) of the same amplitude can tear the lattice into a more pinned disordered state. In this work we present evidence that the mobility of the VL is reduced for large vortex displacements, in agreement with predictions of recent simulations. We show that with large symmetric oscillating fields both an initially ordered or an initially disordered VL configuration evolve towards a less mobile lattice, supporting the scenario of plastic flow. © 2005 The American Physical Society. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v71_n13_p_Moreno http://hdl.handle.net/20.500.12110/paper_10980121_v71_n13_p_Moreno
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We study by ac susceptibility measurements the evolution of the solid vortex lattice mobility under oscillating forces. It has already been shown that in YBCO single crystals, below the melting transition, a temporarily symmetric magnetic ac field (e.g., sinusoidal, square, triangular) can heal the vortex lattice (VL) and increase its mobility, but a temporarily asymmetric one (e.g., sawtooth) of the same amplitude can tear the lattice into a more pinned disordered state. In this work we present evidence that the mobility of the VL is reduced for large vortex displacements, in agreement with predictions of recent simulations. We show that with large symmetric oscillating fields both an initially ordered or an initially disordered VL configuration evolve towards a less mobile lattice, supporting the scenario of plastic flow. © 2005 The American Physical Society.
title Oscillatory dynamics of a superconductor vortex lattice in high amplitude ac magnetic fields
spellingShingle Oscillatory dynamics of a superconductor vortex lattice in high amplitude ac magnetic fields
title_short Oscillatory dynamics of a superconductor vortex lattice in high amplitude ac magnetic fields
title_full Oscillatory dynamics of a superconductor vortex lattice in high amplitude ac magnetic fields
title_fullStr Oscillatory dynamics of a superconductor vortex lattice in high amplitude ac magnetic fields
title_full_unstemmed Oscillatory dynamics of a superconductor vortex lattice in high amplitude ac magnetic fields
title_sort oscillatory dynamics of a superconductor vortex lattice in high amplitude ac magnetic fields
publishDate 2005
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v71_n13_p_Moreno
http://hdl.handle.net/20.500.12110/paper_10980121_v71_n13_p_Moreno
_version_ 1768542138915618816

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