Superconducting vortex pinning with artificial magnetic nanostructures

This review is dedicated to summarizing the recent research on vortex dynamics and pinning effects in superconducting films with artificial magnetic structures. The fabrication of hybrid superconducting/magnetic systems is presented together with the wide variety of properties that arise from the in...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2008-11, Vol.320 (21), p.2547-2562
Main Authors: Vélez, M., Martín, J.I., Villegas, J.E., Hoffmann, A., González, E.M., Vicent, J.L., Schuller, Ivan K.
Format: Article
Language:English
Subjects:
COHERENCE LENGTH
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
FABRICATION
MAGNETIC FLUX
Magnetic nanostructure
MATERIALS SCIENCE
Mesoscopic and nanoscale systems
NANOSTRUCTURES
ORDER-DISORDER TRANSFORMATIONS
PHASE DIAGRAMS
Physics
Properties of type I and type II superconductors
SUPERCONDUCTING FILMS
Superconducting films and low-dimensional structures
Superconducting thin film
Superconductivity
SYMMETRY
Vortex lattices ,flux pinning, flux creep
Vortex pinning
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Summary:This review is dedicated to summarizing the recent research on vortex dynamics and pinning effects in superconducting films with artificial magnetic structures. The fabrication of hybrid superconducting/magnetic systems is presented together with the wide variety of properties that arise from the interaction between the superconducting vortex lattice and the artificial magnetic nanostructures. Specifically, we review the role that the most important parameters in the vortex dynamics of films with regular array of dots play. In particular, we discuss the phenomena that appear when the symmetry of a regular dot array is distorted from regularity towards complete disorder including rectangular, asymmetric, and aperiodic arrays. The interesting phenomena that appear include vortex-lattice reconfigurations, anisotropic dynamics, channeling, and guided motion as well as ratchet effects. The different regimes are summarized in a phase diagram indicating the transitions that take place as the characteristic distances of the array are modified respect to the superconducting coherence length. Future directions are sketched out indicating the vast open area of research in this field.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2008.06.013