The dielectric and the current conduction properties of BaTiO3 epitaxial films that posses Schottky contacts at one surface and a quasi-ohmic contacts at the other surface are measured. The dielectric constant is found to increase monotonically up to, at least, 200 °C. An increase of resistance or a constant resistance is found near TC only in the reverse bias current, which would correspond to the positive temperature coefficient of resistance (PTCR) effect in ceramics. The heterostructures used in the present suggest the PTCR effect as the contribution of the reverse bias conduction.
|Journal||Journal of the Korean Physical Society|
|Publication status||Published - Apr 1 2003|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)