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Giant dielectric phenomenon of Ba0.5Sr0.5TiO3/CaCu3Ti4O12 multilayers due to interfacial polarization for capacitor applications
- Source :
- Journal of the European Ceramic Society. 39:1116-1121
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Ba0.5Sr0.5TiO3/CaCu3Ti4O12 (BST/CCTO) multilayers with different stack sequences were deposited on LaNiO3(LNO)/SiO2/Si substrates by a sol-gel process. The dielectric properties of BST/CCTO multilayers are significantly affected by the deposition sequence, the layer thickness and the impurities, effects that are interpreted using the Maxwell-Wagner interfacial polarization model. Impurities are generated by elemental interdiffusion at the interfaces of BST/CCTO, and less at the interfaces of BST/LNO and CCTO/LNO. The dielectric permittivity of the CCTO/BST/LNO/SiO2/Si sample reaches 352,200 at 10 kHz, and stabilizes above 20,000 in the range of 100 kHz to 1 MHz. This work demonstrates an effective approach to enhance dielectric properties for film capacitor applications by constructing multilayers with specific deposition sequences and layer thicknesses.
- Subjects :
- 010302 applied physics
Materials science
business.industry
Interfacial polarization
02 engineering and technology
Dielectric
021001 nanoscience & nanotechnology
01 natural sciences
law.invention
Capacitor
Film capacitor
Stack (abstract data type)
Impurity
law
0103 physical sciences
Materials Chemistry
Ceramics and Composites
Optoelectronics
0210 nano-technology
business
Layer (electronics)
Deposition (law)
Subjects
Details
- ISSN :
- 09552219
- Volume :
- 39
- Database :
- OpenAIRE
- Journal :
- Journal of the European Ceramic Society
- Accession number :
- edsair.doi...........7a0e085dac1164aec803b643f41b3759