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High-pressure far-infrared absorption measurements on La1-xCaxMnO3-delta by means of synchrotron radiation (Articolo in rivista)
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- 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)
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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
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- Sacchetti, A; Guidi, MC; Arcangeletti, E; Postorino, P; Nucara, A; Piccinini, M; Calvani, P; Marcelli, A (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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