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Title: 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

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,more » 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.« less
Authors:
;  [1] ;  [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [5]
  1. Departamento de Física Aplicada, Instituto de Cibernética, Matemática y Física, 15 # 551, Vedado, Ciudad Habana, CP 10400 (Cuba)
  2. (Mexico)
  3. Laboratorio de Magnetismo, Instituto de Ciencia y Tecnología de Materiales, Universidad de La Habana, La Habana, CP 10400 (Cuba)
  4. Grupo de Ferroelétricos e Materiais Multifuncionais, Instituto de Física, Universidade Federal de Uberlândia, MG (Brazil)
  5. CINVESTAV-Unidad Querétaro, IPN, Libramiento Norponiente No. 2000, Fracc. Real de Juriquilla, CP. 76230 Querétaro, Querétaro (Mexico)
Publication Date:
OSTI Identifier:
22308518
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, 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