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Type: Artigo de periódico
Title: Experimental observation of high-field diamagnetic fluctuations in niobium
Author: Salem-Sugui, S
Friesen, M
Alvarenga, AD
Gandra, FG
Doria, MM
Schilling, OF
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.
Country: EUA
Editor: American Physical Soc
Citation: Physical Review B. American Physical Soc, v. 66, n. 13, 2002.
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.66.134521
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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