Superconducting transition in Pb/Co nanocomposites: effect of Co volume fraction and external magnetic field
Pb films embedded with homogeneously distributed cobalt (Co) nanoparticles (mean size 4.5 nm) have been prepared. Previous transport investigations have suggested that Co particles induce spontaneous vortices below the superconducting transition temperature (T <Subscript>c</Subscript>) in zero external magnetic field. In this paper we study in detail the influence of the Co volume fraction and an external magnetic field on the superconducting transition in such composites. The large difference in T <Subscript>c</Subscript>-reduction between the as-prepared and annealed samples can be attributed to the different superconducting coherence lengths and the resulting different diameters of the spontaneous vortices in these samples. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2010
Year of publication: |
2010
|
---|---|
Authors: | Xing, Y. T. ; Micklitz, H. ; Herrera, W. T. ; Rappoport, T. G. ; Baggio-Saitovitch, E. |
Published in: |
The European Physical Journal B - Condensed Matter and Complex Systems. - Springer. - Vol. 76.2010, 3, p. 353-357
|
Publisher: |
Springer |
Saved in:
Online Resource
Saved in favorites
Similar items by person