Systematic study of disorder induced by neutron irradiation in MgB2 thin films (Articolo in rivista)

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Label
  • Systematic study of disorder induced by neutron irradiation in MgB2 thin films (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.2405121 (literal)
Alternative label
  • Ferrando, V; Pallecchi, I; Tarantini, C; Marre, D; Putti, M; Ferdeghini, C; Gatti, F; Aebersold, HU; Lehmann, E; Haanappel, E; Sheikin, I; Orgiani, P; Xi, XX (2007)
    Systematic study of disorder induced by neutron irradiation in MgB2 thin films
    in Journal of applied physics; American Institute Of Physics (AIP), Melville (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Ferrando, V; Pallecchi, I; Tarantini, C; Marre, D; Putti, M; Ferdeghini, C; Gatti, F; Aebersold, HU; Lehmann, E; Haanappel, E; Sheikin, I; Orgiani, P; Xi, XX (literal)
Pagina inizio
  • 043903-1 (literal)
Pagina fine
  • 043903-8 (literal)
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  • http://dx.doi.org/10.1063/1.2405121 (literal)
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  • 101 (literal)
Rivista
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  • 8 (literal)
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  • 4 (literal)
Note
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR, LAMIA, INFM, I-16146 Genoa, Italy; Univ Genoa, I-16146 Genoa, Italy; Paul Scherrer Inst, CH-5232 Villigen, Switzerland; Univ Toulouse 3, INSA, CNRS, Lab Natl Champs Magnet Pulses, F-31077 Toulouse 4, France; CNRS, GHMFL, MPI FKF, F-38042 Grenoble 9, France; CNR, INFM Supermat, I-84081 Baronissi, SA, Italy; Penn State Univ, University Pk, PA 16802 USA (literal)
Titolo
  • Systematic study of disorder induced by neutron irradiation in MgB2 thin films (literal)
Abstract
  • The effects of neutron irradiation on normal state and superconducting properties of epitaxial magnesium diboride thin films are studied up to fluences of 10(20) cm(-2). All the properties of the films change systematically upon irradiation. Critical temperature is suppressed and, at the highest fluence, no superconducting transition is observed down to 1.8 K. Residual resistivity progressively increases from 1 to 190 mu Omega cm; c axis expands and then saturates at the highest damage level. We discuss the mechanism of damage through the comparison with other damage procedures. The normal state magnetoresistivity of selected samples measured up to high fields (28 and 45 T) allows to determine unambiguously the scattering rates in each band; the crossover between the clean and dirty limit in each sample can be monitored. This set of samples, with controlled amount of disorder, is suitable to study the puzzling problem of critical field in magnesium diboride thin films. The measured critical field values are extremely high (of the order of 50 T in the parallel direction at low fluences) and turns out to be rather independent of the experimental resistivity, at least at low fluences. A simple model to explain this phenomenology is presented.(c) 2007 American Institute of Physics. (literal)
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