| Full text | |
| Author(s): |
Cunha, T. R.
[1]
;
Rodrigues, A. D.
[1]
;
Rodrigues, J. E.
[1]
;
da Costa, R. C.
[2]
;
Toledo, T. A.
[3]
;
Pizani, P. S.
[1]
Total Authors: 6
|
| Affiliation: | [1] Univ Fed Sao Carlos, Dept Phys, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Fed Campina Grande, Dept Environm Engn, BR-58840000 Pombal - Brazil
[3] Univ Fed Mato Grosso, Phys Inst, BR-78060900 Cuiaba - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Materials Research Bulletin; v. 107, p. 462-467, NOV 2018. |
| Web of Science Citations: | 3 |
| Abstract | |
Raman scattering and XRD data allied to Rietveld refinement were used to investigate the structural and vibrational properties of Pb1-xCoxTiO3 samples with x ranging from 0.0 to 1.0. The results showed reductions in the tetragonallity factor and in the wavenumber of E(1TO) soft mode in the interval between x = 0.0 (c/a = 1.063 and E(1TO) = 89 cm(-1)) and x = 0.2 (c/a = 1.042 and E(1TO) = 81 cm(-1)). These parameters present a partial recovery for x > 0.4. Quantitative phase analyses combined with SEM indicate the formation of a solid solution for x less than 0.2 and composite formation of PbTiO3 and CoTiO3 for x higher than 0.2. From the temperature-induced softening of the E(1TO) mode, it was investigated the effect of the atomic substitution on the PbTiO3 Curie temperature, showing a minimum at 720 K (x similar to 0.4) compared to 763 K (x = 0). (AU) | |
| FAPESP's process: | 13/07793-6 - CeRTEV - Center for Research, Technology and Education in Vitreous Materials |
| Grantee: | Edgar Dutra Zanotto |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |