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2-DIMENSIONAL AND 3-DIMENSIONAL VORTEX LATTICE-DYNAMICS IN DYBA2CU3O7-(Y1-XPRX)BA2CU3O7 COUPLED HETEROSTRUCTURES
Dept. de la Matière Condensée, University of Geneva, Geneva.
Dept. de la Matière Condensée, University of Geneva, Geneva.
Dept. de la Matière Condensée, University of Geneva, Geneva.ORCID iD: 0000-0002-9858-6235
Dept. de la Matière Condensée, University of Geneva, Geneva.
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1994 (English)In: Physical Review B Condensed Matter, ISSN 0163-1829, E-ISSN 1095-3795, Vol. 50, no 2, 1229-1236 p.Article in journal (Refereed) Published
Abstract [en]

Vortex dynamics is studied in coupled multilayer structures, containing N 24-angstrom-thick DyBa2Cu3O7 layers, each separated from the next by 96 angstrom of (Y1-xPrx)Ba2Cu3O7 (x = 0. 4, 0.55). When the magnetic field is parallel to the c axis, we find that the activation energy U for flux motion increases linearly with the number of superconducting layers N in the structure for N < 3. This linear increase is the result of the coupled motion of pancake vortices belonging to different DyBa2Cu3O7 layers. For larger N samples the activation energy saturates meaning that the vortex lattice is turning three dimensional. In contrast to samples whose vortex lattice is purely two dimensional and for which we find the activation energy for flux motion proportional to log10B, samples in these series show a crossover to a power-law behavior, U almost-equal-to B-0.5, at a magnetic field H* which decreases as N increases.

Place, publisher, year, edition, pages
1994. Vol. 50, no 2, 1229-1236 p.
Keyword [en]
HIGH-TC SUPERCONDUCTORS, YBA2CU3O7/PRBA2CU3O7 SUPERLATTICES, II SUPERCONDUCTORS, THIN-FILMS, TEMPERATURE, RESISTIVITY, LAYERS, FLUCTUATIONS, MULTILAYERS, MOTION
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-50002DOI: 10.1103/PhysRevB.50.1229ISI: A1994NX63700068OAI: oai:DiVA.org:kth-50002DiVA: diva2:460861
Note
QC 20111205Available from: 2011-12-01 Created: 2011-12-01 Last updated: 2017-12-08Bibliographically approved

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Andersson, Magnus

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