Vortex pinning vs superconducting wire network: Origin of periodic oscillations induced by applied magnetic fields in superconducting films with arrays of nanomagnets

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Hybrid magnetic arrays embedded in superconducting films are ideal systems to study the competition between different physical (such as the coherence length) and structural length scales such as are available in artificially produced structures. This interplay leads to oscillation in many magnetical...

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Autores principales: Gomez, A., Del Valle, J., Gonzalez, E.M., Chiliotte, C.E., Carreira, S.J., Bekeris, V., Prieto, J.L., Schuller, I.K., Vicent, J.L.
Formato: JOUR
Materias:
Little-Parks effect
nanoestructures
vortex pinning
Embedded systems
Magnetization
Superconducting films
Wire
Applied magnetic fields
Broad temperature ranges
Little-Parks effects
Superconducting properties
Temperature intervals
Vortex pinning
Wide temperature ranges
Vortex flow
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09532048_v27_n6_p_Gomez
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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_09532048_v27_n6_p_Gomez2023-10-03T15:50:49Z Vortex pinning vs superconducting wire network: Origin of periodic oscillations induced by applied magnetic fields in superconducting films with arrays of nanomagnets Gomez, A. Del Valle, J. Gonzalez, E.M. Chiliotte, C.E. Carreira, S.J. Bekeris, V. Prieto, J.L. Schuller, I.K. Vicent, J.L. Little-Parks effect nanoestructures vortex pinning Embedded systems Magnetization Superconducting films Wire Applied magnetic fields Broad temperature ranges Little-Parks effects nanoestructures Superconducting properties Temperature intervals Vortex pinning Wide temperature ranges Vortex flow Hybrid magnetic arrays embedded in superconducting films are ideal systems to study the competition between different physical (such as the coherence length) and structural length scales such as are available in artificially produced structures. This interplay leads to oscillation in many magnetically dependent superconducting properties such as the critical currents, resistivity and magnetization. These effects are generally analyzed using two distinct models based on vortex pinning or wire network. In this work, we show that for magnetic dot arrays, as opposed to antidot (i.e. holes) arrays, vortex pinning is the main mechanism for field induced oscillations in resistance R(H), critical current Ic(H), magnetization M(H) and ac-susceptibility χac(H) in a broad temperature range. Due to the coherence length divergence at Tc, a crossover to wire network behaviour is experimentally found. While pinning occurs in a wide temperature range up to Tc, wire network behaviour is only present in a very narrow temperature window close to Tc. In this temperature interval, contributions from both mechanisms are operational but can be experimentally distinguished. © 2014 IOP Publishing Ltd. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09532048_v27_n6_p_Gomez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Little-Parks effect
nanoestructures
vortex pinning
Embedded systems
Magnetization
Superconducting films
Wire
Applied magnetic fields
Broad temperature ranges
Little-Parks effects
nanoestructures
Superconducting properties
Temperature intervals
Vortex pinning
Wide temperature ranges
Vortex flow
spellingShingle Little-Parks effect
nanoestructures
vortex pinning
Embedded systems
Magnetization
Superconducting films
Wire
Applied magnetic fields
Broad temperature ranges
Little-Parks effects
nanoestructures
Superconducting properties
Temperature intervals
Vortex pinning
Wide temperature ranges
Vortex flow
Gomez, A.
Del Valle, J.
Gonzalez, E.M.
Chiliotte, C.E.
Carreira, S.J.
Bekeris, V.
Prieto, J.L.
Schuller, I.K.
Vicent, J.L.
Vortex pinning vs superconducting wire network: Origin of periodic oscillations induced by applied magnetic fields in superconducting films with arrays of nanomagnets
topic_facet Little-Parks effect
nanoestructures
vortex pinning
Embedded systems
Magnetization
Superconducting films
Wire
Applied magnetic fields
Broad temperature ranges
Little-Parks effects
nanoestructures
Superconducting properties
Temperature intervals
Vortex pinning
Wide temperature ranges
Vortex flow
description Hybrid magnetic arrays embedded in superconducting films are ideal systems to study the competition between different physical (such as the coherence length) and structural length scales such as are available in artificially produced structures. This interplay leads to oscillation in many magnetically dependent superconducting properties such as the critical currents, resistivity and magnetization. These effects are generally analyzed using two distinct models based on vortex pinning or wire network. In this work, we show that for magnetic dot arrays, as opposed to antidot (i.e. holes) arrays, vortex pinning is the main mechanism for field induced oscillations in resistance R(H), critical current Ic(H), magnetization M(H) and ac-susceptibility χac(H) in a broad temperature range. Due to the coherence length divergence at Tc, a crossover to wire network behaviour is experimentally found. While pinning occurs in a wide temperature range up to Tc, wire network behaviour is only present in a very narrow temperature window close to Tc. In this temperature interval, contributions from both mechanisms are operational but can be experimentally distinguished. © 2014 IOP Publishing Ltd.
format JOUR
author Gomez, A.
Del Valle, J.
Gonzalez, E.M.
Chiliotte, C.E.
Carreira, S.J.
Bekeris, V.
Prieto, J.L.
Schuller, I.K.
Vicent, J.L.
author_facet Gomez, A.
Del Valle, J.
Gonzalez, E.M.
Chiliotte, C.E.
Carreira, S.J.
Bekeris, V.
Prieto, J.L.
Schuller, I.K.
Vicent, J.L.
author_sort Gomez, A.
title Vortex pinning vs superconducting wire network: Origin of periodic oscillations induced by applied magnetic fields in superconducting films with arrays of nanomagnets
title_short Vortex pinning vs superconducting wire network: Origin of periodic oscillations induced by applied magnetic fields in superconducting films with arrays of nanomagnets
title_full Vortex pinning vs superconducting wire network: Origin of periodic oscillations induced by applied magnetic fields in superconducting films with arrays of nanomagnets
title_fullStr Vortex pinning vs superconducting wire network: Origin of periodic oscillations induced by applied magnetic fields in superconducting films with arrays of nanomagnets
title_full_unstemmed Vortex pinning vs superconducting wire network: Origin of periodic oscillations induced by applied magnetic fields in superconducting films with arrays of nanomagnets
title_sort vortex pinning vs superconducting wire network: origin of periodic oscillations induced by applied magnetic fields in superconducting films with arrays of nanomagnets
url http://hdl.handle.net/20.500.12110/paper_09532048_v27_n6_p_Gomez
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