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

Gómez Gutiérrez, Alicia; Valle Granda, Javier del; González, E. M.; Chiliotte, C. E.; Carreira, S. J.; Bekeris, V.; Prieto Martin, Jose Luis; Schuller, Ivan K. y Vicent López, José Luis (2014). Vortex pinning vs superconducting wire network: origin of periodic oscillations induced by applied magnetic fields in superconducting films with arrays of nanomagnets. "Superconductor Science and Technology", v. 27 (n. 6); pp. 1-6. ISSN 0953-2048. https://doi.org/10.1088/0953-2048/27/6/065017.

Descripción

Título: Vortex pinning vs superconducting wire network: origin of periodic oscillations induced by applied magnetic fields in superconducting films with arrays of nanomagnets
Autor/es:
  • Gómez Gutiérrez, Alicia
  • Valle Granda, Javier del
  • González, E. M.
  • Chiliotte, C. E.
  • Carreira, S. J.
  • Bekeris, V.
  • Prieto Martin, Jose Luis
  • Schuller, Ivan K.
  • Vicent López, José Luis
Tipo de Documento: Artículo
Título de Revista/Publicación: Superconductor Science and Technology
Fecha: Junio 2014
Volumen: 27
Materias:
Palabras Clave Informales: Vortex pinning, nanoestructures, Little–Parks effect
Escuela: E.T.S.I. Telecomunicación (UPM)
Departamento: Electrónica Física
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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 χ ac(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.

Más información

ID de Registro: 35907
Identificador DC: http://oa.upm.es/35907/
Identificador OAI: oai:oa.upm.es:35907
Identificador DOI: 10.1088/0953-2048/27/6/065017
URL Oficial: http://iopscience.iop.org/0953-2048/27/6/065017/
Depositado por: Memoria Investigacion
Depositado el: 27 Jun 2015 10:56
Ultima Modificación: 27 Jun 2015 10:56
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