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- Title
Structure and Magnetic Properties of Monodisperse Fe<sup>3+</sup>-doped CeO<sub>2</sub> Nanospheres.
- Authors
Sumalin Phokha; Supree Pinitsoontorn; Santi Maensiri
- Abstract
This work reports the study concerning the structure and magnetic properties of undoped CeO2 and Fe-doped CeO2 (Ce1-xFexO2, 0.01 ≤ x ≤ 0.07) nanospheres with diameters of 100∼200 nm prepared by hydrothermal method using polyvinylpyrrolidone (PVP) as surfactant. The prepared samples were studied by using X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), X-ray absorption near-edge structure (XANES), and vibrating sample magnetometry (VSM). The XRD results showed that Fe-doped CeO2 was single-phased with a cubic structure, and with Fe3+ successfully substituting in Ce4+ sites. Raman spectra showed a redshift of F2g mode that caused by the Fe doping. The samples of both undoped CeO2 and Fe-doped CeO2 exhibited room temperature ferromagnetism, and the saturated magnetization (Ms) increased with increasing Fe content until x = 0.05, and then the samples displayed ferromagnetic loops as well as paramagnetic behavior. The roles of Ce3+ and Fe3+ spin electrons are discussed for the ferromagnetism in the Fe-doped CeO2.
- Subjects
CRYSTAL structure; IRON ions; DOPED semiconductors; CERIUM oxides; MAGNETIC properties of metals; POVIDONE; TRANSMISSION electron microscopy
- Publication
Nano-Micro Letters, 2013, Vol 5, Issue 4, p223
- ISSN
2311-6706
- Publication type
Article
- DOI
10.5101/nml.v5i4.p223-233