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| Title: | Optical and electrical properties of nanocrystalline La₀.₄Sr₀.₆TiO₃ thin films |
| Alternate Title: | Optical and electrical properties of nanocrystalline La0.4Sr0.6TiO3 thin films |
| Author (s): | Suzuki, T. Jasinski, Piotr Z. Petrovsky, V. Anderson, Harlan U. |
| Department/Lab Affiliations: | Electronic Materials Applied Research Center (EMARC) Materials Science & Engineering |
| Keywords: | absorption coefficient annealing correlation analysis electrical conductivity electrical resistivity energy gap grain size microstructure nanocrystals optical measurement optical properties polymeric precursors quantum confinement spin coating thin films |
| Issue Date: | 2004-04 |
| Publisher: | American Ceramic Society |
| Citation: | Suzuki, T, Jasinski, P, Petrovsky, V, Anderson, H U. Optical and electrical properties of nanocrystalline La0.4Sr0.6TiO3 thin films. Ceramic Transactions Apr. 2004, 67-75 |
| Abstract: | The effects of microstructure on the optical properties of La0.4Sr0.6TiO3 thin films were investigated. Dense films with a thickness of about 200 nm were produced on monocrystalline sapphire substrates using a polymeric precursor spin coating technique. The films were annealed over the temperature range 500-800 C. X-ray data showed the formation of a single cubic perovskite-type structure similar to undoped SrTiO3 for annealing temperatures > 500 C. The grain size was varied from 16 to 30 nm by annealing at temperatures up to about 800 C. Electrical and optical measurements showed a correlation with the microstructure of the films, and the electrical conductivity and optical spectra varied with changes in grain size. From these data, the absorption coefficients were calculated and the band gap energy determined. It was shown that the band gap energy increased as the grain size decreased, which can be explained by the quantum confinement effect. |
| Type: | Article - Conference proceedings text |
| In Title: | Ceramic Transactions |
| Copyright Notice: | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. No full text allowed FULL COPYRIGHT INFORMATION: |
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| title | Optical and electrical properties of nanocrystalline La₀.₄Sr₀.₆TiO₃ thin films |
| title.alternative | Optical and electrical properties of nanocrystalline La0.4Sr0.6TiO3 thin films |
| contributor.author | Suzuki, T. |
| contributor.author | Jasinski, Piotr Z. |
| contributor.author | Petrovsky, V. |
| contributor.author | Anderson, Harlan U. |
| contributor.deptlab | Electronic Materials Applied Research Center (EMARC) |
| contributor.deptlab | Materials Science & Engineering |
| subject | absorption coefficient |
| subject | annealing |
| subject | correlation analysis |
| subject | electrical conductivity |
| subject | electrical resistivity |
| subject | energy gap |
| subject | grain size |
| subject | microstructure |
| subject | nanocrystals |
| subject | optical measurement |
| subject | optical properties |
| subject | polymeric precursors |
| subject | quantum confinement |
| subject | spin coating |
| subject | thin films |
| date.issued | 2004-04 |
| publisher | American Ceramic Society |
| identifier.citation | Suzuki, T, Jasinski, P, Petrovsky, V, Anderson, H U. Optical and electrical properties of nanocrystalline La0.4Sr0.6TiO3 thin films. Ceramic Transactions Apr. 2004, 67-75 |
| description.abstract | The effects of microstructure on the optical properties of La0.4Sr0.6TiO3 thin films were investigated. Dense films with a thickness of about 200 nm were produced on monocrystalline sapphire substrates using a polymeric precursor spin coating technique. The films were annealed over the temperature range 500-800 C. X-ray data showed the formation of a single cubic perovskite-type structure similar to undoped SrTiO3 for annealing temperatures > 500 C. The grain size was varied from 16 to 30 nm by annealing at temperatures up to about 800 C. Electrical and optical measurements showed a correlation with the microstructure of the films, and the electrical conductivity and optical spectra varied with changes in grain size. From these data, the absorption coefficients were calculated and the band gap energy determined. It was shown that the band gap energy increased as the grain size decreased, which can be explained by the quantum confinement effect. |
| type | Article - Conference proceedings |
| type.DCMIType | text |
| relation.isPartOf | Ceramic Transactions |
| rights | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. |
| rights | No full text allowed |
| rights.URI | |
| identifier.persist.URI | |
| date.available | 2009-02-11T16:44:32Z |