title: Room temperature ferromagnetism in Fe-doped CeO2 nanoparticles.
abstract: RT ferromagnetism was observed in nanoparticles of Fe-doped CeO2 (i.e., Ce(0.97)Fe(0.03)O2) synthesized by a sol-gel method. The undoped and Fe-doped CeO2 were characterized by XRD, Raman spectroscopy, TEM, and VSM. The undoped samples and Ce(0.97)Fe(0.03)O2 precursor exhibit a diamagnetic behavior. The 673 K-calcined Ce(0.97)Fe(0.03)O2 sample is paramagnetic whereas 773 and 873 K-calcined Ce(0.97)Fe(0.03)O2 samples are ferromagnetism having the magnetizations of 4.65 x 10(-3) emu/g and 6.20 x 10(-3) emu/g at 10 kOe, respectively. Our results indicate that the ferromagnetic property is intrinsic to the Fe-doped CeO2 system and is not a result of any secondary magnetic phase or cluster formation.
authors.affiliation: Integrated Nanotechnology Research Center and Small and Strong Materials Group, Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.
authors.forename: Santi
authors.initials: S
authors.lastname: Maensiri
authors.forename: Sumalin
authors.initials: S
authors.lastname: Phokha
authors.forename: Paveena
authors.initials: P
authors.lastname: Laokul
authors.forename: Supapan
authors.initials: S
authors.lastname: Seraphin