Abstract
Carrier transport properties such as carrier concentration (ne), Hall mobility (μHall) and Seebeck coefficient (S) for the superlattices of [(BaTiO3)x/(SrTi0.7Nb 0.3O3)1]z (x = 1, 4, 6, 9 and 15) were measured to clarify the critical barrier thickness for the electron confinement in a unit cell layer thickness of SrTi0.7Nb 0.3O3. The μHall values drastically decreased with the x-value due to the Ba-alloying occurred. We observed enhancement of |S| value in BaTiO3/SrTi1-xNb xO3 superlattices due to the quantum size effect, which is similar to SrTiO3/SrTi0.8Nb0.2O3 superlattices. Critical BaTiO3 layer thickness for fully confinement of the conduction electron significantly decreased (6 unit cells) as compared to that of SrTiO3/SrTi0.8Nb0.2O3 superlattices.
Original language | English |
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Pages (from-to) | 375-380 |
Number of pages | 6 |
Journal | Materials Research Society Symposium Proceedings |
Volume | 1044 |
Publication status | Published - 2008 Oct 9 |
Event | Thermoelectric Power Generation - Boston, MA, United States Duration: 2007 Nov 26 → 2007 Nov 29 |
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering