The magnetic characterization of Fe doped TiO 2 semiconducting oxide nanoparticles synthesized by sol–gel method
| Autor: | M. Yeganeh, Nasser Shahtahmasebi, Masoud Karimipour, Lidija Šiller, Ahmad Kompany, F. S. Razavi, N. H. S. Nasralla |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Annealing (metallurgy) Magnetometer Analytical chemistry Oxide Nanoparticle 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials law.invention Paramagnetism chemistry.chemical_compound Nuclear magnetic resonance Ferromagnetism chemistry law 0103 physical sciences Electrical and Electronic Engineering 0210 nano-technology High-resolution transmission electron microscopy Sol-gel |
| Zdroj: | Physica B: Condensed Matter. 511:89-98 |
| ISSN: | 0921-4526 |
| DOI: | 10.1016/j.physb.2017.02.010 |
| Popis: | In this work Fe doped TiO2 nanoparticles were synthesized at different Fe/Ti molar ratio from 1% to 5% by sol-gel technique. The post annealing of the samples was carried out at T=400, 600, and 800 °C. HRTEM of the samples revealed that the mean size of the nanoparticles increases from about 8 nm to about 100 nm as the annealing temperature increased. SQUID magnetometry of 1% and 5% Fe doped TiO2 has shown mixed ferromagnetic and paramagnetic phases within the crystal while ferromagnetic order with Tc about 350 K was only observed in 5% Fe:TiO2 sample annealed at T=800 °C. The oxygen vacancy mediated ferromagnetic (FM) interaction could be responsible for the observed FM. |
| Databáze: | OpenAIRE |
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