Intrinsic electric transport in CMR thin-films (Articolo in rivista)

Type
Label
  • Intrinsic electric transport in CMR thin-films (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1007/s10948-005-0067-1 (literal)
Alternative label
  • S. Mercone; C. A. Perroni; V. Cataudella; G. De Filippis; C. Adamo; M. Angeloni; C. Aruta; F. Miletto-Granozio; A. Oropallo; P. Perna; A. Yu. Petrov; U. Scotti di Uccio; G. Balestrino; L. Maritato (2005)
    Intrinsic electric transport in CMR thin-films
    in Journal of superconductivity
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • S. Mercone; C. A. Perroni; V. Cataudella; G. De Filippis; C. Adamo; M. Angeloni; C. Aruta; F. Miletto-Granozio; A. Oropallo; P. Perna; A. Yu. Petrov; U. Scotti di Uccio; G. Balestrino; L. Maritato (literal)
Pagina inizio
  • 719 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 18 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1. Univ Salerno, Coherenzia INFM, I-84081 Baronissi, SA, Italy 2. Univ Salerno, Dipartimento Fis ER Caianiello, I-84081 Baronissi, SA, Italy 3. Univ Naples, Coherenzia INFM, I-80126 Naples, Italy 4. Univ Naples, Dipartimento Sci Fisiche, I-80126 Naples, Italy 5. Univ Roma Tor Vergata, Dipartimento Ingn Meccan, Coherenzia INFM, I-00133 Rome, Italy 6. Univ Cassino, Coherentia INFM, I-03043 Cassino, Italy 7. Univ Cassino, DiMSAT, I-03043 Cassino, Italy (literal)
Titolo
  • Intrinsic electric transport in CMR thin-films (literal)
Abstract
  • The colossal magnetoresistance (CMR) manganese oxides, have been the subject of intense studies. To elucidate the mechanisms at work in the ferromagnetic metallic state is essential for the comprehension of the M-I transition and the associated CMR effect. We present here comparison among resistivities behavior in Ca and Sr-doped manganite films (x = 0.3) grown by different techniques and on several substrates allowing to analyze samples with different amounts of disorder. At low temperatures, a dominant T(2) term in the resistivity has generally been observed. Our analysis shows that for residual resistivity values larger than a critical one, there is a substantial deviation from the T(2)-like behavior and that an unusual T(25) one is robust. This behavior supports the theoretical proposal of single magnon scattering in the presence of minority spin states localized by the disorder. In the high temperature insulating paramagnetic phase the resistivity shows the activated behavior characteristic of polaronic carriers. Finally in the whole range of temperatures the experimental data are found to be consistent with a phase separation scenario. (literal)
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