Charge-collection (CC) current was measured at a single grain boundary, which exhibited positive temperature coefficient of resistivity (PTCR) effects, in 0.1-mol%-Nb-doped BaTiO 3. The CC current systematically reversed across the grain boundary above the Curie point, which indicated the presence of a double Schottky barrier (DSB) at the grain boundary. In contrast, the CC current was constant across the grain boundary below the Curie temperature. The result obtained from the CC current measurement agrees with the classical DSB model in donordoped BaTiO 3, indicating the PTCR effects.
|Number of pages||3|
|Journal||Journal of the American Ceramic Society|
|Publication status||Published - 1998 Jul 1|
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry