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Title: Correlation between upconversion photoluminescence and dielectric response in Ba-substituted (Sr{sub 1−x}Ba{sub x}){sub 4}(La{sub 0.85}Ho{sub 0.025}Yb{sub 0.125}){sub 2}Ti{sub 4}Nb{sub 6}O{sub 30}

The filled tetragonal tungsten bronze (Sr{sub 1−x}Ba{sub x}){sub 4}(La{sub 0.85}Ho{sub 0.025}Yb{sub 0.125}){sub 2}Ti{sub 4}Nb{sub 6}O{sub 30} (SBLTNx: Ho-Yb) ceramics with different Ba substitution levels (x) are prepared. The upconversion photoluminescence (UC-PL) and dielectric permittivity are investigated. The substitution of Sr{sup 2+} ions at the A{sub 2}-sites by larger Ba{sup 2+} ions results in substantial variation of the UC-PL intensity as a function of substitution level x. Furthermore, the dielectric response to the substitution of Sr{sup 2+} by Ba{sup 2+} suggests a close correlation between the UC-PL intensity and dielectric permittivity. The origin for this correlation is discussed based on the random stress field (RSF) model.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ; ;  [4]
  1. College of Science, Civil Aviation University of China, Tianjin 300300 (China)
  2. (China)
  3. School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin 300160 (China)
  4. Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093 (China)
Publication Date:
OSTI Identifier:
22303889
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 26; 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; BARIUM COMPOUNDS; CERAMICS; CORRELATIONS; DIELECTRIC MATERIALS; HOLMIUM COMPOUNDS; LANTHANUM COMPOUNDS; NIOBIUM COMPOUNDS; OXYGEN COMPOUNDS; PERMITTIVITY; PHOTOLUMINESCENCE; SIMULATION; STRESSES; STRONTIUM COMPOUNDS; TITANIUM COMPOUNDS; TUNGSTEN BRONZE; YTTERBIUM COMPOUNDS