Transport critical-current density of superconducting films with hysteretic ferromagnetic dots
Valle Benedí, Nuria del (Universitat Autònoma de Barcelona. Departament de Física)
Navau Ros, Carles (Universitat Autònoma de Barcelona. Departament de Física)
Sánchez Moreno, Álvaro (Universitat Autònoma de Barcelona. Departament de Física)
Dinner, Rafael B. (University of Cambridge. Department of Materials Science and Metallurgy)

Date:	2012
Abstract:	Superconductor-ferromagnet hybrids present a rich and complex phenomenology. Particularly, a hysteretic behavior on the transport critical-current density, as a function of a uniform perpendicular applied field, has been experimentally found in superconducting films with some embedded ferromagnets. Here we analyze the interaction superconductor-ferromagnets by means of an iterative model based on the critical-statemodel with field-dependent internal critical-current density and compare the results with actual transport measurements. By using arguments of field compensation, we show how the change in the magnetization of the ferromagnetic inclusions is responsible for the observed hysteresis on the transport critical current.
Grants:	Ministerio de Economía y Competitividad CSD2007-00041
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Applied field ; Ferromagnetic dots ; Ferromagnets ; Hysteretic behavior ; Iterative model ; Transport critical current ; Transport measurements
Published in:	AIP advances, Vol. 2, Núm. 2 (June 2012) , art. 22166, ISSN 2158-3226

DOI: 10.1063/1.4732314

8 p, 469.0 KB

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