Stable tetragonal phase and magnetic properties of Fe-doped HfO2 nanoparticles
| Autor: | L.F.D. Pereira, B. Bosch-Santos, R. N. Saxena, Gabriel A. Cabrera-Pasca, T. S. N. Sales, Artur W. Carbonari, F. H. M. Cavalcante, Rafael S. Freitas |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Scanning electron microscope Analytical chemistry General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences lcsh:QC1-999 chemistry.chemical_compound Paramagnetism Magnetization chemistry Electron diffraction Transmission electron microscopy 0103 physical sciences Magnetic nanoparticles 0210 nano-technology lcsh:Physics Hafnium dioxide Electron backscatter diffraction |
| Zdroj: | AIP Advances, Vol 7, Iss 5, Pp 056315-056315-6 (2017) |
| ISSN: | 2158-3226 |
| DOI: | 10.1063/1.4976583 |
| Popis: | In this paper, the effect in structural and magnetic properties of iron doping with concentration of 20% in hafnium dioxide (HfO2) nanoparticles is investigated. HfO2 is a wide band gap oxide with great potential to be used as high-permittivity gate dielectrics, which can be improved by doping. Nanoparticle samples were prepared by sol-gel chemical method and had their structure, morphology, and magnetic properties, respectively, investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) with electron back scattering diffraction (EBSD), and magnetization measurements. TEM and SEM results show size distribution of particles in the range from 30 nm to 40 nm with small dispersion. Magnetization measurements show the blocking temperature at around 90 K with a strong paramagnetic contribution. XRD results show a major tetragonal phase (94%). |
| Databáze: | OpenAIRE |
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