Effect of Fe-doping on the structural, microstructural, optical, and ferroeletric properties of Pb1/2Sr1/2Ti1-xFexO3 oxide prepared by spin coating technique

Author(s)

Pontes, F. M. ^[1] ; Pontes, D. S. L. ^[2] ; Chiquito, A. J. ^[3] ; Pereira-da-Silva, Marcelo A. ^{[4, 5]} ; Longo, E. ^{[2, 6]}

Affiliation

^[1] Univ Estadual Paulista, UNESP, Dept Chem, BR-17033360 Sao Paulo - Brazil

^[2] Univ Fed Sao Carlos, Dept Chem, LIEC, BR-13565905 Sao Carlos, SP - Brazil

^[3] Univ Fed Sao Carlos, Dept Phys, NanO LaB, BR-13565905 Sao Carlos, SP - Brazil

^[4] Univ Sao Paulo, Inst Phys Sao Carlos, BR-13560250 Sao Carlos, SP - Brazil

^[5] UNICEP, BR-13563470 Sao Carlos, SP - Brazil

^[6] Univ Estadual Paulista, UNESP, Inst Chem, Sao Paulo - Brazil

• Document type: Journal article
• Source: Materials Letters; v. 138, p. 179-183, JAN 1 2015.
• Web of Science Citations: 6

Abstract

The influence of Fe content on the structural, microstructural, dielectric, ferroelectric and optical properties was investigated in Pb1/2Sr1/2Ti1-xFexO3 films deposited on Si/SiO2/Ti/Pt and quartz substrates. X-ray diffraction showed that all films presented polycrystalline and single perovskite phases and the change of lattice parameters caused by increasing Fe-doping content replacing Ti4+ ions is very small to be detected by X-ray diffraction technique. Micro-Raman analysis showed the tetragonal nature for both undoped-PSTF and cloped-PSTF (1%Fe) films, while both cloped-PSTF (5%Fe) and PSIT-10 (10%Fe) films presented a pseudocubic structure. It was noticed that all films exhibited a homogeneous microstructure, compact and crack-free. The remnant polarization in the Fe-doped PSTF films was weaker than that for undoped-PSTF films which was attributed to structural changes and smaller grain size. The increasing of Fe content leads to a red shifted band gap relative to undoped PSTF films due localized levels within the forbidden band of PSTF. (C) 2014 Elsevier BM. All rights reserved. (AU)

• FAPESP's process: 08/57872-1 - National Institute for Materials Science in Nanotechnology
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 12/14106-2 - Designe multifunctional oxides with perovskite architecture (Pb, Sr, La, BI) (Ti, Fe) O3
• Grantee: Fenelon Martinho Lima Pontes
• Support Opportunities: Regular Research Grants
• FAPESP's process: 11/20536-7 - Multifunctional Ferroelectric Materials: Studies of Optical, Electrical and Photoluminescent Properties.
• Grantee: Debora da Silva Lima Pontes
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC