Artículo
Abstract:
We present infrared reflectivity and transmission spectra from 30 to 25000 cm-1 of the perovskites CaRuO3-δ and SrRuO3-δ annealed in argon atmosphere and measured at room temperature and 77 K. The structural and physical consequences upon deoxygenation of CaRuO3-δ and SrRuO3-δ are found in the infrared spectra as a decrease of the plasma frequency, implying fewer effective carriers, and the appearance of phonon bands at 337, 873, and 1436 cm-1. This allows us to infer that deoxygenation mechanisms generate metal-insulator transitions and perhaps spin reordering. Comparing with the data of untreated CaRuO3 and SrRuO3 samples, the influence of the lattice on the optical conductivity became evident. Our overall results suggest that a polaronic environment may provide for the lower energy extra anomalies in the electrodynamic quantities as recently established by Ahn et al. (Phys. Rev. Lett. 82, 5321 (1999)).
Registro:
| Documento: | Artículo |
| Título: | Phonon activity upon reducing ARuO3-δ (A = Ca, Sr) |
| Autor: | De La Cruz, F.P.; Massa, N.E.; Nassif, V.M.; Cuffini, S.L.; Carbonio, R.E.; Salva, H. |
| Filiación: | Lab. Nac. de Investigación, Departamento de Química, Universidad Nacional de La Plata, C.C. 962, 1900 La Plata, Argentina Departamento de Física, Universidad de Buenos Aires, Pab. 1, 1429 Capital Federal, Argentina Lab. Nac. de Investigatión, Departamento de Física, Universidad Nacional de La Plata, C.C. 962, 1900 La Plata, Argentina Inst. Nac. Fisicoquimica de Cordoba, Departamento de Fisicoquímica, Univ. Nacional de Córdoba, Suc. 16, C.C. 61, 5016 Córdoba, Argentina Comn. Nac. de Ener. Atómica, Centro Atómico Bariloche, Instituto Balseiro, 8400 Bariloche, Rio Negro, Argentina |
| Año: | 2000 |
| Volumen: | 220 |
| Número: | 1 |
| Página de inicio: | 603 |
| Página de fin: | 607 |
| DOI: | http://dx.doi.org/10.1002/1521-3951(200007)220:1<603::AID-PSSB603>3.0.CO;2-4 |
| Título revista: | Physica Status Solidi (B) Basic Research |
| Título revista abreviado: | Phys. Status Solidi B Basic Res. |
| ISSN: | 03701972 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03701972_v220_n1_p603_DeLaCruz |
Referencias:
- Bouchard, J., Gillson, J., (1972) Mater. Res. Bull., 7, p. 837
- Catchen, G., Rearick, T., Schlon, D., (1994) Phys. Rev. B, 49, p. 318
- Bom, C., (1992) Science, 258, p. 1766
- Couzi, M., Van Houng, P., (1972) J. Chim. Phys., Phys.-Chim. Biol., 69, p. 1339
- Tajima, S., Masaki, A., Uchida, S., Matsura, T., Fueki, K., Sugai, S., (1987) J. Phys. C, 20, p. 3469
- Massa, N.E., Salva, H., Carbonio, R.E., (1997) Phys. Rev. B, 56, p. 16
- Kurosawa, T., (1961) J. Phys. Soc. Jpn., 161, p. 298
- Ahn, J., Bak, J., Cao, H., Now, T., Han, J., Bang, Y., Cho, J., Jia, Q., (1999) Phys. Rev. Lett., 82, p. 5321
- De La Cruz, F.P., Massa, N.E., Cuffini, S.L., Carbonio, R.E., (1996) Ferroelectrics, 185, p. 277
Citas:
---------- APA ----------
De La Cruz, F.P., Massa, N.E., Nassif, V.M., Cuffini, S.L., Carbonio, R.E. & Salva, H. (2000) . Phonon activity upon reducing ARuO3-δ (A = Ca, Sr). Physica Status Solidi (B) Basic Research, 220(1), 603-607.http://dx.doi.org/10.1002/1521-3951(200007)220:1<603::AID-PSSB603>3.0.CO;2-4
---------- CHICAGO ----------
De La Cruz, F.P., Massa, N.E., Nassif, V.M., Cuffini, S.L., Carbonio, R.E., Salva, H. "Phonon activity upon reducing ARuO3-δ (A = Ca, Sr)" . Physica Status Solidi (B) Basic Research 220, no. 1 (2000) : 603-607.http://dx.doi.org/10.1002/1521-3951(200007)220:1<603::AID-PSSB603>3.0.CO;2-4
---------- MLA ----------
De La Cruz, F.P., Massa, N.E., Nassif, V.M., Cuffini, S.L., Carbonio, R.E., Salva, H. "Phonon activity upon reducing ARuO3-δ (A = Ca, Sr)" . Physica Status Solidi (B) Basic Research, vol. 220, no. 1, 2000, pp. 603-607.http://dx.doi.org/10.1002/1521-3951(200007)220:1<603::AID-PSSB603>3.0.CO;2-4
---------- VANCOUVER ----------
De La Cruz, F.P., Massa, N.E., Nassif, V.M., Cuffini, S.L., Carbonio, R.E., Salva, H. Phonon activity upon reducing ARuO3-δ (A = Ca, Sr). Phys. Status Solidi B Basic Res. 2000;220(1):603-607.http://dx.doi.org/10.1002/1521-3951(200007)220:1<603::AID-PSSB603>3.0.CO;2-4
