Investigation of optical and magnetic properties of Mn-doped tetragonal ZrO2 nanocrystals
| Autor: | Chandu V. V. Muralee Gopi, Aleksandr S. Kamzin, Hammad Mueen Arbi, Sangaraju Sambasivam, Venkatesha Narayanaswamy, Pardha Saradhi Maram, Ihab M. Obaidat |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Absorption spectroscopy Analytical chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Nanocrystalline material 0104 chemical sciences Electronic Optical and Magnetic Materials Inorganic Chemistry Tetragonal crystal system Ferromagnetism Materials Chemistry Ceramics and Composites Diamagnetism Crystallite Physical and Theoretical Chemistry Selected area diffraction 0210 nano-technology Superparamagnetism |
| Zdroj: | Journal of Solid State Chemistry. 294:121872 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/j.jssc.2020.121872 |
| Popis: | Pure and Mn-doped ZrO2 nanocrystals (Zr1-xMnxO2) with varying Mn concentrations (x = 0.02, 0.04, 0.06, and 0.08) have been synthesized using sol-gel method. The effect of Mn doping concentration on structural, optical and magnetic properties has been investigated. X-ray diffraction data and SAED analysis revealed that all Zr1-xMnxO2 nanocrystals have a tetragonal structure without any secondary phase. The average crystallite size obtained from XRD decreases (within the experimental uncertainty) with increased Mn concentration. Magnetic measurements have revealed that Zr0.98Mn0.02O2 nanocrystalline sample exhibits both low and room temperature ferromagnetism. The origin of ferromagnetism is attributed to the anionic vacancies created due to Mn doping in ZrO2. Higher Mn concentrations shows superparamagnetism whereas pure ZrO2 displayed diamagnetic behavior. The UV–Vis absorption spectra showed a wide absorption peak at 200–330 nm, and a redshift was observed in the bandgap with an increase in the concentration of Mn2+. |
| Databáze: | OpenAIRE |
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