Electrical and thermodynamic study of SrTiO3 reduction using the van der Pauw method
| Autor: | F. S. Oliveira, Bruno Sanches de Lima, Luan Gabriel Guimarães, Carlos Alberto Moreira dos Santos, Mario S. da Luz |
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| Rok vydání: | 2021 |
| Předmět: |
Work (thermodynamics)
Materials science Condensed matter physics FOTOLUMINESCÊNCIA Doping 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Van der Pauw method Hall effect Electrical resistivity and conductivity Linear scale General Materials Science 0210 nano-technology Reduction (mathematics) Quantum |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 0254-0584 |
| Popis: | This work deals with SrTiO3-δ single crystals annealed under vacuum. The electrical resistivity and the carrier density were measured at room temperature by the van der Pauw method using an Arduino-based device for automatic contact switching integrated to the Quantum Design PPMS. The data acquired from the annealed samples were plotted along with a data compilation from several previous reports. The analyses confirm a linear scaling between the electrical resistivity and the Hall coefficient which attends for a wide doping window. Hence, the room temperature carrier density can be estimated from a simple electrical resistivity measurement. A brief discussion about the thermodynamics of the vacuum annealing process is reported. The entalphy is estimatted as 3.6(4) eV for the SrTiO3 reduction process. |
| Databáze: | OpenAIRE |
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