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Type: Artigo de periódico
Title: Raman Scattering In Cmr Manganites
Author: Granado E.
Moreno N.O.
Garcia A.
Sanjurjo J.A.
Rettori C.
Torriani I.
Oseroff S.B.
Neumeier J.J.
McClellan K.J.
Cheong S.-W.
Tokura Y.
Abstract: Polarized Roman spectra of single and polyciystalline Lai_xSrxMnO3 ceramic samples were studied as a function of temperature. For the rhombohedral LaMnO&i and Lao.ySro.aMnOa, the observed Raman peaks were associated to modes arising from the folding of the Brillouin zone under lattice deformation. For the orthorhombic LaMnOs.o, the Raman spectra are consistent with the Pnma structure and show an anomalous softening of the 494 and 604 cm"1 modes below the antiferromagnetic ordering temperature, TV ~ 140 K. © 1999 Trans Tech Publications,.
Rights: fechado
Identifier DOI: 
Date Issue: 1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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