Ferromagnetism in Fe-doped MgO nanoparticles
| Autor: | Kornkanok Boonserm, Ekaphan Swatsitang, Sumalin Phokha, Santi Maensiri, Sitchai Hunpratub, Jutharatana Klinkaewnarong |
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| Rok vydání: | 2015 |
| Předmět: |
010302 applied physics
Valence (chemistry) Materials science Condensed matter physics Magnetometer Analytical chemistry 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Polaron 01 natural sciences Atomic and Molecular Physics and Optics XANES Electronic Optical and Magnetic Materials law.invention Magnetization Ferromagnetism law Transmission electron microscopy 0103 physical sciences Crystallite Electrical and Electronic Engineering 0210 nano-technology |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 27:33-39 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-015-3713-9 |
| Popis: | This work reports the study on magnetic properties of Mg1−xFexO (x = 0, 0.05 and 0.07) nanoparticles prepared by the polymer pyrolysis method. Phase, valence states and magnetic properties of these samples were characterized using X-ray diffraction (XRD), transmission electron microscopy, X-ray absorption near edge structure (XANES) and vibrating sample magnetometer (VSM), respectively. The XRD results show that the samples have a phase nature of the cubic structure with constant crystallite size of 25 ± 2 nm. XANES spectra reveal the existence of Fe3+ ions in the samples. VSM measurements exhibit the room temperature ferromagnetism with a maximum magnetization of 1.60 emu/g for x = 0.07. The origin of ferromagnetism is fitted on the bound magnetic polaron (BMP) model to indicate the numbers of BMPs involving overlapping of polarons via oxygen vacancy defects. |
| Databáze: | OpenAIRE |
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