Superconducting properties of tin embedded in nanometer-sized pores of glass

The electrical resistance of tin embedded from a melt in porous glasses with an average pore diameter of ∼7 nm has been investigated at low temperatures in magnetic fields up to 2 T. The temperatures of the transition to the superconducting state for nanocrystalline tin have been determined in magne...

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Bibliographic Details
Published in:Physics of the solid state 2012-12, Vol.54 (12), p.2345-2350
Main Authors: Shikov, A. A., Zemlyanov, M. G., Parshin, P. P., Naberezhnov, A. A., Kumzerov, Yu. A.
Format: Article
Language:English
Subjects:
Analysis
Magnetic fields
Physics
Physics and Astronomy
Solid State Physics
Superconductivity
Superconductors
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Summary:The electrical resistance of tin embedded from a melt in porous glasses with an average pore diameter of ∼7 nm has been investigated at low temperatures in magnetic fields up to 2 T. The temperatures of the transition to the superconducting state for nanocrystalline tin have been determined in magnetic fields of 0, 0.3, 0.5, 1.0, 1.5, and 2.0 T. It has been found that the temperature and magnetic-field dependences of the electrical resistance of the nanocomposite under investigation exhibit two transitions to the superconducting state. The nature of the double superconducting transitions has been discussed. The H c - T c phase diagram has been constructed using the entire set of data on the magnetic-field and temperature dependences of the electrical resistance of nanostructured tin. This phase diagram indicates that the upper critical magnetic field H c 2 (0) for nanostructured tin is almost two orders of magnitude higher than the corresponding field for bulk tin.
ISSN:1063-7834
1090-6460
DOI:10.1134/S106378341212030X