Lowest Landau level diamagnetic fluctuations in niobium

We have performed a magnetic study of a bulk metallic sample of Nb with critical temperature T c = 8.5 K. Magnetization measurements taken for magnetic fields greater than 1 kOe show a superconducting transition that becomes broader as the field is increased. The data are well described by lowest La...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2004-08, Vol.408, p.664-665
Main Authors: Salem-Sugui, Said, Friesen, M., Alvarenga, A.D., Schilling, Osvaldo F., Gandra, F.G., Doria, M.M.
Format: Article
Language:English
Subjects:
Fluctuations
Magnetization
Niobium
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Summary:We have performed a magnetic study of a bulk metallic sample of Nb with critical temperature T c = 8.5 K. Magnetization measurements taken for magnetic fields greater than 1 kOe show a superconducting transition that becomes broader as the field is increased. The data are well described by lowest Landau level (LLL) fluctuation theory. A scaling analysis yields values for the superconducting transition temperature under field T c( H) which are consistent with H c2( T).
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2004.06.010