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Possible entanglement of the vortices in dyba2cu3O7 (y1-xprx)ba2cu3O7 coupled heterostructure
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: Physica. C, Superconductivity, ISSN 0921-4534, E-ISSN 1873-2143, Vol. 235, 2599-2600 p.Article in journal (Refereed) Published
Abstract [en]

Thermally activated flux motion is studied in proximity coupled multilayers, containing a number N of 24 Angstrom thick DyBa2Cu3O7 layers separated by 96 Angstrom (or more) of(Y1-xPrx)Ba2Cu3O7 alloy (x=0.4, x=0.55). In contrast to ultra-thin decoupled layers, for which we find that the activation energy for flux motion U approximate to=logB (H//c), coupled samples show a cross-over to a power law behaviour U approximate to B–0.5 at magnetic field H*. This characteristic field depends on the anisotropy and decreases as N increases, a behaviour which can be understood in terms of the entanglement of the vortices, resulting in a relative increase of U due to the flux line crossing energy.

Place, publisher, year, edition, pages
1994. Vol. 235, 2599-2600 p.
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Condensed Matter Physics
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URN: urn:nbn:se:kth:diva-50000DOI: 10.1016/0921-4534(94)92520-8ISI: A1994QC69600225OAI: oai:DiVA.org:kth-50000DiVA: diva2:460862
Note
QC 20111206. International Conference on Materials and Mechanisms of Superconductivity - High Temperature Superconductors IV (M2S-HTSC IV), GRENOBLE, FRANCE, JUL 05-09, 1994Available from: 2011-12-01 Created: 2011-12-01 Last updated: 2017-12-08Bibliographically approved

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Andersson, Magnus

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