Abstract
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.
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Acknowledgments
The authors would like to thank the Synchrotron Light Research Institute (Public Organization), Nakhon Ratchasima, Thailand for XANES facilities, the Department of Physics, Khon Kaen University for providing VSM facilities and the Advanced Materials Physics (AMPs) Laboratory for our research.
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Phokha, S., Klinkaewnarong, J., Hunpratub, S. et al. Ferromagnetism in Fe-doped MgO nanoparticles. J Mater Sci: Mater Electron 27, 33–39 (2016). https://doi.org/10.1007/s10854-015-3713-9
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DOI: https://doi.org/10.1007/s10854-015-3713-9