High pressure Raman study of La1-xCaxMnO3-delta manganites (Articolo in rivista)

Type
Label
  • High pressure Raman study of La1-xCaxMnO3-delta manganites (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • Sacchetti, A; Corridoni, T; Arcangeletti, E; Postorino, P (2008)
    High pressure Raman study of La1-xCaxMnO3-delta manganites
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Sacchetti, A; Corridoni, T; Arcangeletti, E; Postorino, P (literal)
Pagina inizio
  • 301 (literal)
Pagina fine
  • 305 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 66 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Sacchetti, A.] ETH, Festkorperphys Lab, CH-8093 Zurich, Switzerland; [Corridoni, T.] Univ Roma Tre, Dipartimento Fis, I-00146 Rome, Italy; [Arcangeletti, E.; Postorino, P.] Univ Roma La Sapienza, Coherentia CNR INFM, I-00185 Rome, Italy; [Arcangeletti, E.; Postorino, P.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy (literal)
Titolo
  • High pressure Raman study of La1-xCaxMnO3-delta manganites (literal)
Abstract
  • We report a high-pressure Raman study on two members of the La1-xCaxMnO3-delta manganite family (x = 0.20, delta = 0 and delta = 0.08). The results obtained for the delta = 0 sample show a different behavior in the low and high pressure regime which is ascribed to the onset of a new pressure-activated interaction previously invoked in other manganite compounds. The comparison of our results with literature data gives further support to the identification of the Jahn-Teller sensitive stretching mode and shows that pressure-induced octahedral symmetrization is more effective in systems exhibiting a lower metallic character. On the contrary the new interaction sets in at a pressure which decreases on increasing the metallic character of the system indicating an important role of the Mn-Mn hopping integral in its activation. (literal)
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