Geometrical Confinement Effects in Layered Mesoscopic Vortex Matter

We study the geometrical confinement effect in Bi 2 Sr 2 CaCu 2 O 8 + δ mesoscopic vortex matter with edge-to-surface ratio of 7–12 %. Samples have in-plane square and circular edges, 30 μ m widths, and ∼ 2 μ m thickness. Direct vortex imaging reveals the compact planes of the structure align with t...

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Bibliographic Details
Published inJournal of low temperature physics Vol. 179; no. 1-2; pp. 35 - 41
Main Authors Cejas Bolecek, N. R., Dolz, M. I., Kolton, A., Pastoriza, H., Beek, C. J. van der, Konczykowski, M., Menghini, M., Nieva, G., Fasano, Y.
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.04.2015
Subjects
Characterization and Evaluation of Materials
Condensed Matter Physics
Magnetic Materials
Magnetism
Physics
Physics and Astronomy
Vortex matter
Mesoscopic physics
Layered superconductors
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Summary:We study the geometrical confinement effect in Bi 2 Sr 2 CaCu 2 O 8 + δ mesoscopic vortex matter with edge-to-surface ratio of 7–12 %. Samples have in-plane square and circular edges, 30 μ m widths, and ∼ 2 μ m thickness. Direct vortex imaging reveals the compact planes of the structure align with the sample edge by introducing topological defects. The defect density is larger for circular than for square edges. Molecular dynamics simulations suggest that this density is not an out-of-equilibrium property but rather determined by the geometrical confinement.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-014-1218-1