Ferroelectric and dielectric properties of bismuth-layered structural Sr{sub 2}Bi{sub 4-} {sub x}Ln{sub x} Ti{sub 5}O{sub 18} (Ln=La, Nd, Sm and Dy) ceramics
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002 (China)
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002 (China) and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210008 (China)
La, Nd, Sm, and Dy-doped Sr{sub 2}Bi{sub 4}Ti{sub 5}O{sub 18} (SBTi) ceramic samples have been prepared by the solid-state reaction method. The X-ray diffraction reveals that all of the ceramic samples are single phase compounds. Their remnant polarization (2P {sub r}) increases at first, and then decreases with the increase of doping content. When doping content is 0.01, Sm and Dy-doped SBTi samples exhibit the maximum 2P {sub r} of 18.2 and 20.1 {mu}C/cm{sup 2}, respectively. While La and Nd-doped SBTi samples display the maximum 2P {sub r} value of 18.4 and 19.1 {mu}C/cm{sup 2} with doping content of 0.05 and 0.10, respectively. The ferroelectric properties of Sr{sub 2}Bi{sub 4-} {sub x}Ln{sub x} Ti{sub 5}O{sub 18} are found to be dominated by the competition of the decrease of oxygen vacancy concentration and the relief of structural distortion. - Graphical abstract: The temperature dependence of the dielectric loss for (a) SBST, and (b) SBDT at 500 kHz. Display Omitted.
- OSTI ID:
- 20905310
- Journal Information:
- Journal of Solid State Chemistry, Vol. 179, Issue 6; Other Information: DOI: 10.1016/j.jssc.2006.03.012; PII: S0022-4596(06)00159-9; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BISMUTH COMPOUNDS
CERAMICS
DIELECTRIC PROPERTIES
DOPED MATERIALS
DYSPROSIUM COMPOUNDS
FERROELECTRIC MATERIALS
KHZ RANGE 100-1000
LANTHANUM COMPOUNDS
NEODYMIUM COMPOUNDS
OXIDES
POLARIZATION
SAMARIUM COMPOUNDS
STRONTIUM COMPOUNDS
TEMPERATURE DEPENDENCE
TITANIUM COMPOUNDS
VACANCIES
X-RAY DIFFRACTION