High-pressure far-infrared absorption measurements on La1-xCaxMnO3-delta by means of synchrotron radiation (Articolo in rivista)

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Label
  • High-pressure far-infrared absorption measurements on La1-xCaxMnO3-delta by means of synchrotron radiation (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Alternative label
  • Sacchetti, A; Guidi, MC; Arcangeletti, E; Postorino, P; Nucara, A; Piccinini, M; Calvani, P; Marcelli, A (2006)
    High-pressure far-infrared absorption measurements on La1-xCaxMnO3-delta by means of synchrotron radiation
    in Infrared physics & technology
    (literal)
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  • Sacchetti, A; Guidi, MC; Arcangeletti, E; Postorino, P; Nucara, A; Piccinini, M; Calvani, P; Marcelli, A (literal)
Pagina inizio
  • 92 (literal)
Pagina fine
  • 95 (literal)
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  • 49 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
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  • ETH, Festkorperphys Lab, CH-8093 Zurich, Switzerland; Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy; Univ Roma La Sapienza, Dipartimento Fis, I-00187 Rome, Italy; Univ Roma La Sapienza, Coherentia INFM, I-00187 Rome, Italy (literal)
Titolo
  • High-pressure far-infrared absorption measurements on La1-xCaxMnO3-delta by means of synchrotron radiation (literal)
Abstract
  • High-pressure far-infrared absorption measurements carried on three La1-xCaxMnO3-delta samples, exploiting synchrotron radiation are reported. Present data represent the first measurement of this kind performed on manganites. Our results show a pressure-induced charge delocalization effect only in the stoichiometric samples, whereas a complete metallization is not achieved. The pressure dependence of the frequencies of the main phonon bands and of the gap-energy is presented and discussed. An interpretation of our results in terms of a phase separation scenario is also proposed. (c) 2006 Elsevier B.V. All rights reserved. (literal)
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