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Type: Artigo de periódico
Title: The Infrared Reflectivity In Srtio3 And The Antidistortive Transition
Author: Galzerani J.C.
Katiyar R.S.
Abstract: We have studied the infrared reflectivity spectra of SrTiO3, at various temperatures, down to 15 K. A Classical Dispersion model was used to fit the reflectivity spectra, considering both uncoupled and coupled modes. We also carried out a Kramers-Kronig analysis. The reflectivity in the low frequency region gradually increases on lowering the temperature, due to the soft mode behaviour. We also noticed that a new dip appears in the spectra below Tc∼110K, which has not previously been reported and which accounts for the Eu mode arising from the R'25 mode in the cubic symmetry. © 1982.
Rights: fechado
Identifier DOI: 10.1016/0038-1098(82)90189-2
Date Issue: 1982
Appears in Collections:Unicamp - Artigos e Outros Documentos

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