Parallel and perpendicular field investigations of coupled high-Tc multilayer structures
1994 (English)In: Superconducting Superlattices and Multilayers / [ed] Ivan Bozovic, Bellingham: SPIE - International Society for Optical Engineering, 1994, Vol. 2157, 192-198 p.Conference paper (Refereed)
We report on the behavior of high Tc superconductors coupled multilayer structures in magnetic field parallel and perpendicular to the ab plane. These structures consist of N 24 angstroms thick DyBa2Cu3O7 layers, each separated from the next by 96 angstroms of an (Y0.45Pr0.55)Ba2Cu3O7 alloy. This alloy allows a coupling of the superconducting layers as demonstrated by measurements of the activation energies for flux motion U. For a N = 15 sample one finds, in perpendicular fields, that a correlated motion of pancake vortices occurs with a characteristic length of about 480 angstroms. Additionally, U is found to be proportional to logB at low fields while at higher fields a power law behavior is observed. In parallel field we find U to be field independent up to 1 T, suggesting that the vortices are trapped at low fields in the material where weak superconductivity is induced by proximity effect.
Place, publisher, year, edition, pages
Bellingham: SPIE - International Society for Optical Engineering, 1994. Vol. 2157, 192-198 p.
, Proceedings of SPIE - The International Society for Optical Engineering, ISSN 0277786X ; 2157
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:kth:diva-50761DOI: 10.1117/12.179158OAI: oai:DiVA.org:kth-50761DiVA: diva2:462628
Superconducting Superlattices and Multilayers. Los Angeles, CA, USA. 24 January 1994 - 25 January 1994
QC 201112132011-12-072011-12-072011-12-13Bibliographically approved