Comprehensive theoretical and experimental study of electrical transport mechanism on BiFeO 3 multiferroic nanoparticles
| Autor: | Jose A. Souza, F.E.N. Ramirez, Cedric Rocha Leão, Enesio Marinho |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Mechanical Engineering Metals and Alloys 02 engineering and technology Activation energy Electronic structure Conductivity 021001 nanoscience & nanotechnology 01 natural sciences Ion Adsorption Mechanics of Materials Electrical resistivity and conductivity Chemical physics Desorption 0103 physical sciences Materials Chemistry Ionic conductivity 010306 general physics 0210 nano-technology |
| Zdroj: | Journal of Alloys and Compounds. 720:47-53 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2017.05.191 |
| Popis: | We have performed a comprehensive study of electrical properties at high temperatures of single-phase BiFeO3 nanoparticles. Our results revealed a strong dependence of electrical resistivity behavior and activation energy on thermal cycle due to adsorption/desorption of water molecules. Ionic conductivity due to oxygen vacancies as well as H+ ions should dominate the electronic current after the initial heating and cooling cycle explaining the change in the charge transport properties due to thermal, temperature, and atmosphere history. Electronic structure simulations indicated that the characteristics of the conductivity in the original sample is consistent with band-to-band transitions, expected in a material rich in oxygen. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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