Granularity and vortex dynamics in LaFeAsO0.92F0.08 probed by harmonics of the ac magnetic susceptibility (Articolo in rivista)

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Label
  • Granularity and vortex dynamics in LaFeAsO0.92F0.08 probed by harmonics of the ac magnetic susceptibility (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.78.224523 (literal)
Alternative label
  • Polichetti, M; Adesso, MG; Zola, D; Luo, JL; Chen, GF; Li, Z; Wang, NL; Noce, C; Pace, S (2008)
    Granularity and vortex dynamics in LaFeAsO0.92F0.08 probed by harmonics of the ac magnetic susceptibility
    in Physical review. B, Condensed matter and materials physics; American Physical Society (APS), College Pk (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Polichetti, M; Adesso, MG; Zola, D; Luo, JL; Chen, GF; Li, Z; Wang, NL; Noce, C; Pace, S (literal)
Pagina inizio
  • 224523 (literal)
Pagina fine
  • 224523-10 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://prb.aps.org/abstract/PRB/v78/i22/e224523 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 78 (literal)
Rivista
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  • 10 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Polichetti, Massimiliano; Adesso, Maria G.; Zola, Danilo; Noce, Canio; Pace, Sandro] Univ Salerno, Dipartimento Fis ER Caianiello, I-84081 Baronissi, Italy; [Luo, Jianlin; Chen, G. F.; Li, Zheng; Wang, N. L.] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China (literal)
Titolo
  • Granularity and vortex dynamics in LaFeAsO0.92F0.08 probed by harmonics of the ac magnetic susceptibility (literal)
Abstract
  • Fundamental and higher harmonics of the ac magnetic susceptibility have been measured on LaFeAsO0.92F0.08 samples as a function of the temperature, at various amplitudes and frequencies of the ac magnetic field, with a small superimposed dc field parallel to the ac field. The granularity of the samples has been investigated and the intergrain and intragrain contributions have been clearly individuated looking at both the first and the third harmonics. The vortex dynamics has been also analyzed, and a comparison with the magnetic behavior of both the MgB2 and the cuprate superconductors has been performed. Some vortex dissipative phenomena, i.e., the thermally activated flux flow and the flux creep, have been detected in the presented experimental data, similar to what have been obtained on YBCO. Nevertheless, although the general behavior is similar, several differences have been also evidenced between these different classes of superconductors, mainly in the third harmonics. We infer that different vortex dynamics has to be included into the analysis of the magnetic response in this iron-based material. (literal)
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