Size dependent dielectric, magnetic, transport and magnetodielectric properties of BiFe0.98Co0.02O3 nanoparticles
| Autor: | A.D. Joshi, Davit Dhruv, Hardik Gohil, D.K. Chudasama, D. D. Pandya, Bhargav Rajyaguru, V.G. Shrimali, P.S. Solanki, Nikesh A. Shah, Keval Gadani |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Mechanical Engineering Metals and Alloys Analytical chemistry Sintering Nanoparticle Context (language use) 02 engineering and technology Dielectric 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Magnetization Mechanics of Materials Phase (matter) Materials Chemistry Particle size Crystallite 0210 nano-technology |
| Zdroj: | Journal of Alloys and Compounds. 817:152685 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2019.152685 |
| Popis: | Nanostructured polycrystalline samples of BiFe0.98Co0.02O3 (BFCO) with various sizes were prepared using acetate precursor based modified sol–gel method. Rhombohedral phase of nanoparticles has been confirmed by X–ray diffraction (XRD) measurement. The electrical and magnetic properties of samples were investigated for different sized nanoparticles (47.25–93.30 nm). The effect of sintering temperature on the structural, microstructural and dielectric properties has been discussed in the context of crystallite size and oxygen vacancy concentration. The temperature dependent impedance study confirms that the temperature dependent relaxation process is non Debye type and dominated by the short–range movement of oxygen vacancies. The value of magnetization is found to increase with decreasing particle size. Large magnetodielectric (MD) effect has been observed for BFCO nanoparticles with size less than ∼ 62 nm. Complex impedance spectroscopy analysis has been used to ensure intrinsic MD effect. |
| Databáze: | OpenAIRE |
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