1. Size effects on the quantum paraelectric SrTiO3 nanocrystals
- Author
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Sook-Il Kwun, T.K. Song, and Jong Min Kim
- Subjects
Phase transition ,Materials science ,Condensed matter physics ,General Chemistry ,Dielectric ,Condensed Matter Physics ,Ferroelectricity ,Nanocrystalline material ,Condensed Matter::Materials Science ,Nanocrystal ,Materials Chemistry ,Particle ,Particle size ,Quantum - Abstract
Nano-size effects on the dielectric properties in the quantum paraelectric SrTiO 3 were studied. Nanocrystalline SrTiO 3 powders were prepared by the sol-gel method, and the particle sizes were controlled by varying firing temperatures. The sizes were determined to be from 12 to 44 nm using Scherrer's formula. The classical paraelectric to quantum paraelectric phase transition temperatures were suggested to be increased for the smaller particle size samples. These results could be explained with the aid of transverse Ising model.
- Published
- 1996
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