Probing charge carrier transport regimes in BiFeO3 nanoparticles by Raman spectroscopy
| Autor: | Dejan M. Djokić, Dimitrije Stepanenko, Bojan Stojadinović, Zorana Dohčević-Mitrović |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Mechanical Engineering Metals and Alloys 02 engineering and technology Conductivity 021001 nanoscience & nanotechnology Condensed Matter Physics Condensed Matter::Disordered Systems and Neural Networks 01 natural sciences Variable-range hopping symbols.namesake Paramagnetism Mechanics of Materials Electrical resistivity and conductivity Phase (matter) 0103 physical sciences symbols Antiferromagnetism Condensed Matter::Strongly Correlated Electrons General Materials Science Charge carrier 0210 nano-technology Raman spectroscopy |
| Zdroj: | Scripta Materialia. 181:6-9 |
| ISSN: | 1359-6462 |
| Popis: | We report a finding of two transport regimes in multiferroic BiFeO3 nanoparticles, which correspond to variable range hopping (VRH) mechanisms. Switch between the two regimes coincides with the transition between antiferromagnetic (AF) and paramagnetic (PM) phase. At low temperatures, it was found that temperature dependence of indirectly extracted resistivity is consistent with Efros-Shklovskii mechanism. As with high temperatures, data fit favourably to Mott VRH theory. Estimated resistivity value of ~ 350mΩcm violates the Mott-Ioffe-Regel criterion, corroborating that the transport does not proceed through conduction bands. Conductivity was probed noninvasively via Raman contactless setup and studied as a function of temperature. |
| Databáze: | OpenAIRE |
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