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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Combining XRD and Raman spectroscopy techniques to probe the solid solution and composite forms of Pb1-xCoxTiO3 systems

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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: 2
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 - CEPIV - Center for Teaching, Research and Innovation in Glass
Grantee:Edgar Dutra Zanotto
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC