Spectrally resolved microprobe cathodoluminescence of intergrowth Bi{sub 5-x}La{sub x}TiNbWO{sub 15} ferroelectrics
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, 606-8585, Kyoto (Japan) and Research Institute for Nanoscience (RIN) Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, 606-8585, Kyoto (Japan)
Spectrally resolved cathodoluminescence measurements of Bi{sub 5-x}La{sub x}TiNbWO{sub 15} (x=0-1.50) ceramics at room temperature showed three distinct luminescence bands located at about 380, 502, and 660 nm, respectively, which were tentatively assigned to F{sup +} center, oxygen vacancy-related defect and octahedron structure-related luminescence center, respectively. These assignments could be made in light of electron irradiation experiments with different exposure times. Bands related to oxygen vacancies were clearly enhanced by lanthanum doping, indicating that charge compensation occurred by the substitution of Bi for La{sup 3+} in perovskitelike structured intergrowth ferroelectrics. We observed that, for contents of La{sup 3+} x>0.75, La{sup 3+} ions entered the [Bi{sub 2}O{sub 2}]{sup 2+} layer according to a doping mechanism which is briefly discussed in this letter.
- OSTI ID:
- 21062149
- Journal Information:
- Journal of Applied Physics, Vol. 102, Issue 7; Other Information: DOI: 10.1063/1.2767857; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
Similar Records
The crystal chemistry and physical properties of the triple layer perovskite intergrowths LaSr{sub 3}Fe{sub 3}O{sub 10-delta} and LaSr{sub 3}(Fe{sub 3-x}Al{sub x})O{sub 10-delta}.
The crystal chemistry and physical properties of the triple layer perovskite intergrowths LaSr[sub 3]Fe[sub 3]O[sub 10[minus][delta]] and LaSr[sub 3](Fe[sub 3[minus]x]Al[sub x])O[sub 10[minus][delta]]