Raman and infrared spectroscopy of Sr2B′UO6 (B′ = Ni; Co) double perovskites
Temperature dependent normal modes and lattice thermal expansion of Sr 2B′UO6 (B′ = Ni, Co) double perovskites were investigated by Raman/infrared spectroscopies and synchrotron X-ray diffraction, respectively. Monoclinic crystal structures with space group P21/n were confirmed for both compounds, w...
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| Autores principales: | , , , , , , , , , , , , |
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| Formato: | Articulo Preprint |
| Lenguaje: | Inglés |
| Publicado: |
2010
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/95142 https://ri.conicet.gov.ar/11336/67485 |
| Aporte de: |
| id |
I19-R120-10915-95142 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Química Double perovskites Infrared reflectivity Raman scattering Synchrotron x-ray powder diffraction |
| spellingShingle |
Química Double perovskites Infrared reflectivity Raman scattering Synchrotron x-ray powder diffraction Moreira, A. F. L. García Flores, A. F. Granados, E. Massa, Néstor Emilio Pinacca, Rubén Miguel Pedregosa, José Carmelo Carbonio, Raul Ernesto Muñoz, A. Martínez Lope, M. J. Alonso, J. A. Campo, L. del De Sousa Meneses, D. Echegut, P. Raman and infrared spectroscopy of Sr2B′UO6 (B′ = Ni; Co) double perovskites |
| topic_facet |
Química Double perovskites Infrared reflectivity Raman scattering Synchrotron x-ray powder diffraction |
| description |
Temperature dependent normal modes and lattice thermal expansion of Sr 2B′UO6 (B′ = Ni, Co) double perovskites were investigated by Raman/infrared spectroscopies and synchrotron X-ray diffraction, respectively. Monoclinic crystal structures with space group P21/n were confirmed for both compounds, with no clear structural phase transition between 10 and 400 K. As predicted for this structure, the first-order Raman and infrared spectra show a plethora of active modes. In addition, the Raman spectra reveal an enhancement of the integrated area of an oxygen stretching mode, which is also observed in higher-order Raman modes, and an anomalous softening of ∼1 cm-1 upon cooling below T* ∼ 300 K. In contrast, the infrared spectra show conventional temperature dependence. The band profile phonon anomalies are possibly related to an unspecified electronic property of Sr2B′UO6 (B′ = Ni, Co). |
| format |
Articulo Preprint |
| author |
Moreira, A. F. L. García Flores, A. F. Granados, E. Massa, Néstor Emilio Pinacca, Rubén Miguel Pedregosa, José Carmelo Carbonio, Raul Ernesto Muñoz, A. Martínez Lope, M. J. Alonso, J. A. Campo, L. del De Sousa Meneses, D. Echegut, P. |
| author_facet |
Moreira, A. F. L. García Flores, A. F. Granados, E. Massa, Néstor Emilio Pinacca, Rubén Miguel Pedregosa, José Carmelo Carbonio, Raul Ernesto Muñoz, A. Martínez Lope, M. J. Alonso, J. A. Campo, L. del De Sousa Meneses, D. Echegut, P. |
| author_sort |
Moreira, A. F. L. |
| title |
Raman and infrared spectroscopy of Sr2B′UO6 (B′ = Ni; Co) double perovskites |
| title_short |
Raman and infrared spectroscopy of Sr2B′UO6 (B′ = Ni; Co) double perovskites |
| title_full |
Raman and infrared spectroscopy of Sr2B′UO6 (B′ = Ni; Co) double perovskites |
| title_fullStr |
Raman and infrared spectroscopy of Sr2B′UO6 (B′ = Ni; Co) double perovskites |
| title_full_unstemmed |
Raman and infrared spectroscopy of Sr2B′UO6 (B′ = Ni; Co) double perovskites |
| title_sort |
raman and infrared spectroscopy of sr2b′uo6 (b′ = ni; co) double perovskites |
| publishDate |
2010 |
| url |
http://sedici.unlp.edu.ar/handle/10915/95142 https://ri.conicet.gov.ar/11336/67485 |
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Repositorios |
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