Synthesis Dependent Structural Magnetic and Electrical Properties of CR-Doped Lead-Free Multiferroic AlFeO3
| Autor: | Lamia Ben Farhat, Sharah A. A. Aldulmani, Imen Raies, Mongi Amami |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Permittivity
Materials science site disorder General Chemical Engineering 02 engineering and technology Dielectric 010402 general chemistry 01 natural sciences Inorganic Chemistry lcsh:QD901-999 General Materials Science Ceramic multiferroic material Condensed matter physics 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Dielectric spectroscopy visual_art visual_art.visual_art_medium Cr-doped AlFeO3 Orthorhombic crystal system Dielectric loss Grain boundary Crystallite lcsh:Crystallography 0210 nano-technology dielectric study |
| Zdroj: | Crystals, Vol 10, Iss 440, p 440 (2020) Crystals Volume 10 Issue 6 |
| ISSN: | 2073-4352 |
| Popis: | Polycrystalline samples AlFe0.95Cr0.05O3 synthetized by a solid state (SR) and a co-precipitation (cop) method show an orthorhombic system in space group Pc21n. It was found that, the cation distribution and magnetic ordering vary toughly on the synthesis conditions. We deployed impedance spectroscopy in studying the dielectric behavior of AlFe0.95Cr0.05O3. The significant results of this work are: for both samples, permittivity and dielectric loss are very sensitive to the temperature and frequency variation. The existence of supplementary imperfections and conducting species in AFCr5-s ceramics led to important dielectric permittivity in AFCr5-s. Values of the activation energy determined at low temperature point toward oxygen vacancies motion in slight range, however at high temperature, such a motion turns to long-range one. The dielectric response in case of AFCr5-s was assigned throw complex impedance plots to the grain as well as grain boundary. Conversely, additional individual pores similarly participate to dielectric belongings of AFCr5-cop. |
| Databáze: | OpenAIRE |
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