Paraconductivity of MgB2 thin films

Paraconductivity of MgB2 has been measured in homogeneous thin films grown by Hybrid physical chemical vapor deposition. In order to reduce the possible effects of spatial inhomogeneities, stripes of different widths were cut on the films. We measured several samples with different resistivity value...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2007-09, Vol.460-462 (1), p.608-609
Main Authors: Ferrando, V., Pallecchi, I., Malagoli, A., Putti, M., Xi, X.X., Varlamov, A.A., Koshelev, A.E., Ferdeghini, C.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
High-tc films
Physics
Superconducting films and low-dimensional structures
Superconductivity
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Summary:Paraconductivity of MgB2 has been measured in homogeneous thin films grown by Hybrid physical chemical vapor deposition. In order to reduce the possible effects of spatial inhomogeneities, stripes of different widths were cut on the films. We measured several samples with different resistivity values; after subtracting the normal state resistivity, paraconductivity appears to be of the same order of magnitude in all the samples. The dependence on the reduced temperature ε=ln(T/Tc) is discussed and compared with the existing models.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2007.04.116