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Zero-dimensional superconducting fluctuations and fluctuating diamagnetism in lead nanoparticles (Articolo in rivista)
- Type
- Label
- Zero-dimensional superconducting fluctuations and fluctuating diamagnetism in lead nanoparticles (Articolo in rivista) (literal)
- Anno
- 2006-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1103/PhysRevB.74.134509 (literal)
- Alternative label
Bernardi, E; Lascialfari, A; Rigamonti, A; Romano, L; Iannotti, V; Ausanio, G; Luponio, C (2006)
Zero-dimensional superconducting fluctuations and fluctuating diamagnetism in lead nanoparticles
in Physical review. B, Condensed matter and materials physics
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Bernardi, E; Lascialfari, A; Rigamonti, A; Romano, L; Iannotti, V; Ausanio, G; Luponio, C (literal)
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Univ Pavia, Dept Phys A Volta, I-27100 Pavia, Italy; Univ Pavia, Unita CNISM, CNR, I-27100 Pavia, Italy; Univ Parma, Dept Phys, I-43100 Parma, Italy; Univ Parma, Unita CNISM, CNR, I-43100 Parma, Italy; Univ Naples Federico II, Dept Phys Sci, Coherentia CNR INFM, I-80125 Naples, Italy; Univ Naples Federico II, Dept Mat Engn & Prod, I-80125 Naples, Italy (literal)
- Titolo
- Zero-dimensional superconducting fluctuations and fluctuating diamagnetism in lead nanoparticles (literal)
- Abstract
- High-resolution superconducting quantum interference device magnetization measurements in lead nanoparticles with particle size d less than the superconducting coherence length xi are used to study zero-dimensional fluctuating diamagnetism. The diamagnetic magnetization M-dia (H, T=const) as a function of the applied magnetic field H at constant temperature is reported in the critical region and compared with the observed behavior in the temperature range where the first-order fluctuation corrections are expected to hold. The magnetization curves are analyzed in the framework of exact fluctuation theories based on the Ginzburg-Landau functional for xi > d. The role of the upturn field H-up, where the slope of M-dia (H) changes sign, is discussed. The relevance of the magnetization curves over a wide range of magnetic fields and the role of H-up for the study of fluctuating diamagnetism, in particular, when the first-order fluctuation correction breaks down, is pointed out. The size and temperature dependences of H-up in the critical region are obtained from the experimental data and compared to the theoretical derivations for M-dia. (literal)
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