Coexistence of superconductivity and superparamagnetism in Pb–Co electrodeposited nanowires

Pb–Co nanowires were electrodeposited in 100 nm nominal pore diameter polycarbonate membranes. Above the T C of Pb we modelled the behaviour of the wires with a Langevin function, obtaining a Co volume of (1.06 ± 0.01) × 10 −7  cm 3 divided into clusters of ≈10 atoms in size. The magnetic response o...

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Bibliographic Details
Published in:Applied physics. A, Materials science & processing Materials science & processing, 2017-03, Vol.123 (3), p.1-5, Article 161
Main Authors: Riminucci, Alberto, Schwarzacher, Walther
Format: Article
Language:English
Subjects:
Applied physics
Characterization and Evaluation of Materials
Clusters
Cobalt
Condensed Matter Physics
Machines
Manufacturing
Materials science
Nanotechnology
Nanowires
Optical and Electronic Materials
Physics
Physics and Astronomy
Processes
Superconductivity
Surfaces and Interfaces
Thin Films
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Summary:Pb–Co nanowires were electrodeposited in 100 nm nominal pore diameter polycarbonate membranes. Above the T C of Pb we modelled the behaviour of the wires with a Langevin function, obtaining a Co volume of (1.06 ± 0.01) × 10 −7  cm 3 divided into clusters of ≈10 atoms in size. The magnetic response of the wires in the 3–10 K interval, which comprises T C , was modelled by adding spherical superconducting Pb grains to the Co clusters; the Pb grains were found to be (87 ± 6) nm in diameter. The Co clusters were not interacting and were not magnetically screened by the superconducting Pb.
ISSN:0947-8396
1432-0630
DOI:10.1007/s00339-017-0782-z