Photoluminescence in Pb{sub 0.95}Sr{sub 0.05}(Zr{sub 1−x}Ti{sub x}){sub 1−y}Cr{sub y}O{sub 3} ferroelectric ceramic system
- Departamento de Física Aplicada, Instituto de Cibernética, Matemática y Física, 15 # 551, Vedado, Ciudad Habana, CP 10400 (Cuba)
- Laboratorio de Magnetismo, Instituto de Ciencia y Tecnología de Materiales, Universidad de La Habana, La Habana, CP 10400 (Cuba)
- Grupo de Ferroelétricos e Materiais Multifuncionais, Instituto de Física, Universidade Federal de Uberlândia, MG (Brazil)
- CINVESTAV-Unidad Querétaro, IPN, Libramiento Norponiente No. 2000, Fracc. Real de Juriquilla, CP. 76230 Querétaro, Querétaro (Mexico)
Over the past several years, there has been a remarkable growth and development in new ceramic and/or composite materials to be used in the electro-electronic industry. Ferroelectric materials have been recognized for their multifunctional physical properties; also, their optical properties are a subject of intense research effort due to their possible electro-optic applications. In this work, the visible photoluminescence effect is analyzed at room temperature in a sintered Pb{sub 0.95}Sr{sub 0.05}(Zr{sub 1−x}Ti{sub x}){sub 1−y}Cr{sub y}O{sub 3} perovskite-type structure system, doped with Sr and Cr. The excitation bands used were 267, 325, 373, 457, 635, and 680 nm, but the best result was obtained at 373 nm. The intensity and energy of such emission in this system have been studied by changing the molar Cr concentration (0 < y < 0.005) and the Ti content (x), with x = 0.20, 0.40, 0.53, 0.60, and 0.80, on both sides of the morphotropic phase boundary (MPB) zone. The principal emission bands are at the energies 1.73, 1.87, and 3.03 eV. The changes that were caused by Zr or Ti ions in the symmetry presented in the rhombohedral or tetragonal side of the MPB are more important. Additionally, structural and micro-structural measurements were performed by the x-ray diffraction and scanning electron microscopy techniques, respectively. The micro-Raman technique is also used in the study of this set of samples, which allows finding the Raman shift modes and the influence on the structural changes of the dopants.
- OSTI ID:
- 22308518
- Journal Information:
- Journal of Applied Physics, Vol. 116, Issue 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CERAMICS
CHROMIUM COMPOUNDS
COMPOSITE MATERIALS
CRYSTAL GROWTH
DOPED MATERIALS
EXCITATION
FERROELECTRIC MATERIALS
LEAD COMPOUNDS
OPTICAL PROPERTIES
OXYGEN COMPOUNDS
PEROVSKITE
PHOTOLUMINESCENCE
SCANNING ELECTRON MICROSCOPY
STRONTIUM COMPOUNDS
TEMPERATURE RANGE 0273-0400 K
TITANIUM COMPOUNDS
TITANIUM IONS
TRIGONAL LATTICES
X-RAY DIFFRACTION
ZIRCONIUM COMPOUNDS