Tailoring the structural, optical and magnetic properties of BiFeO3 multiferroic nanoparticles by Ba, Cr co-doping
| Autor: | Himanshu Sekhar Panda, Amiya Priyam, Debdulal Das, B. Bhushan, Dibyaranjan Rout, A. Puhan, Viresh Kumar |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Dopant Band gap Mechanical Engineering Doping Analytical chemistry Nanoparticle 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Crystallinity Ferromagnetism Mechanics of Materials Phase (matter) 0103 physical sciences General Materials Science Multiferroics 0210 nano-technology |
| Zdroj: | Materials Science and Engineering: B. 241:48-54 |
| ISSN: | 0921-5107 |
| DOI: | 10.1016/j.mseb.2019.02.009 |
| Popis: | Phase pure BiFeO3 (BFO) and Bi0.98Ba0.02Fe1-xCrxO3 (x = 0.01, 0.02, 0.03, 0.04) nanoparticles were synthesized by a facile sol-gel route. X-ray diffraction data confirms rhombohedral R3c phase of BFO and Ba, Cr co-doped BFO nanoparticles with a slight distortion at higher dopant concentration. TEM images verified the higher crystallinity of the samples with a significant reduction in particle size (∼40 nm) with increasing Cr concentration. The band gap of pristine BFO nanoparticles was found to be 1.8 eV which increases remarkably to a maximum of 2.32 eV for Ba, Cr co-doped BFO nanoparticles. 57Fe Mossbauer spectroscopy confirmed that no mixed valance state of Fe was present in the Ba, Cr co-doped BFO nanoparticles. Hysteresis loops of all the samples revealed the weak ferromagnetic nature of the co-doped BFO nanoparticles. It was observed that the saturation magnetization increased by more than 3 times when Cr content was increased from 1% to 4%. |
| Databáze: | OpenAIRE |
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