Metal-insulator transition temperature enhancement in La0.7Ca0.3MnO3 thin films (Articolo in rivista)

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  • Metal-insulator transition temperature enhancement in La0.7Ca0.3MnO3 thin films (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.1898451 (literal)
Alternative label
  • M. Salvato; A. Vecchione; A. De Santis; F. Bobba; and A.M. Cucolo (2005)
    Metal-insulator transition temperature enhancement in La0.7Ca0.3MnO3 thin films
    in Journal of applied physics (online); American Institute Of Physics (AIP), Melville (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • M. Salvato; A. Vecchione; A. De Santis; F. Bobba; and A.M. Cucolo (literal)
Pagina inizio
  • 103712-1 (literal)
Pagina fine
  • 103712-5 (literal)
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  • http://jap.aip.org/resource/1/japiau/v97/i10/p103712_s1?isAuthorized=no (literal)
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  • 97 (literal)
Rivista
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  • 6 (literal)
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  • 103712 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Salerno, Dipartimento Fis ER Caianiello, I-84081 Baronissi, Salerno, Italy INFM, Lab Reg SUPERMAT, I-84081 Baronissi, Salerno, Italy (literal)
Titolo
  • Metal-insulator transition temperature enhancement in La0.7Ca0.3MnO3 thin films (literal)
Abstract
  • The effect of oxygen annealing on the structural and transport properties ofLa0.7Ca0.3MnO3 thin films deposited on SrTiO3 substrates has been investigated by x-ray diffraction analysis and resistive measurements. The as-grown films are fully tensile strained on the substrates and show a depressed metal-insulator transition temperatureTp = 131 K. As the oxygen content is increased due to longer annealing times, significantly higher Tp are measured, up to 247 K. Correspondingly, an increase of the out-of-plane lattice parameter is observed while the in-plane lattice constants do not change with respect to the as-grown films, which prevents any interpretation of a Tpdependence on the strain. The large increase in Tp is then interpreted in terms of a combined effect of the Mn4+/Mn3+ ratio variation, the change in the carrier density in thea-b planes, and the increase in the hydrostatic strain with the oxygen annealing. (literal)
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