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|Type:||Artigo de periódico|
|Title:||Experimental observation of high-field diamagnetic fluctuations in niobium|
|Abstract:||We have performed a magnetic study of a bulk metallic sample of Nb with critical temperature T-c = 8.5 K. Magnetization versus temperature (M vs T) data obtained for fixed magnetic fields above 1 kOe show a superconducting transition which becomes broader as the field is increased. The data are interpreted in terms of the diamagnetic lowest Landau level (LLL) fluctuation theory. The scaling analysis gives values of the superconducting transition temperature T-c(H) consistent with H-c2(T). We search for universal three-dimensional LLL behavior by comparing scaling results for Nb and YBaCuO, but obtain no evidence for universality.|
|Editor:||American Physical Soc|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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