Speaker
Dr
Sumalin Phokha
(Department of Physics, Faculty of Science, Udon Thani Rajabhat University, Udon Thani, THAILAND 41000)
Description
Fe-doped MgO (Mg${}_{1-x}$Fe${}_x$O, $x$ = 0, 0.05, and 0.07) nanoparticles synthesized by the polymer pyrolysis method were investigated. The precursors were calcined at temperatures of 700 ${}^{\circ}$C for 3 hours in air to obtain the phase of MgO. X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray absorption near edge spectroscopy (XANES), and vibrating sample magnetometry (VSM) were used to characterize phase, morphology, valence states and magnetic properties of the samples. The samples had a phase of the face centered cubic with crystallite sizes of 25 $\pm$ 2 nm. The result of XANES spectra showed that the Fe${}^{3+}$ exists in the samples. The weak ferromagnetic (FM) behavior at room temperature (RT) is observed for all Mg${}_{1-x}$Fe${}_x$O samples with a maximum magnetization of 1.30 emu/g for $x$ = 0.07. The origin of ferromagnetism of the prepared Mg${}_{1-x}$Fe${}_x$O samples was discussed.
Author
Dr
Sumalin Phokha
(Department of Physics, Faculty of Science, Udon Thani Rajabhat University, Udon Thani, THAILAND 41000)
Co-authors
Dr
Kornkanok Boonserm
(Department of Applied Chemistry, Faculty of Science and Liberal Arts, Rajamangala University of Technology Isan, Nakhon Ratchasima, THAILAND 30000)
Prof.
Santi Maensiri
(School of Physics, Institute of Science, Suranaree University of Technology, Nakorn Ratchasima, THAILAND 30000)
Mr
Sitchai Hunpratub
(Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, THAILAND 40002)
