Investigations on Magnetic and Electrical Properties of Zn doped Fe2O3 Nanoparticles and their correlation with local electronic structure

Title
Investigations on Magnetic and Electrical Properties of Zn doped Fe2O3 Nanoparticles and their correlation with local electronic structure
Authors
채근화Parmod KumarVikas SharmaJitendra P. SinghAshish KumarSurjeet ChahalK. SachdevAshok KumarK. AsokanD. Kanjilal
Keywords
structural, magnetic and dielectric properties; Fe2O3 nanoparticles; local electronic structures; X-ray absorption near-edge structure
Issue Date
2019-11
Publisher
Journal of magnetism and magnetic materials
Citation
VOL 489-165398-8
Abstract
Present work aims at investigating the structural, magnetic and dielectric properties of zinc doped Fe2O3 nanoparticles (pure, 10%, 20% & 30%) and correlated with their local electronic structures using X-ray absorption near-edge structure (XANES) spectroscopy. X-ray diffraction and Raman measurements infer that doping of Zn cations lead to the formation of secondary phases corresponding to ZnFe2O4 along with the hematite phase of Fe2O3. Magnetic measurements show that magnetization vs magnetic field curve for 10% Zn doping exhibit maximum saturation magnetization (~2.93  ×  10− 3  emu/g) as well as the coercivity (~956 Oe). The values of these parameters decrease for higher content of Zn. The temperature dependence of dielectric behaviour follows the same trend as that of the lattice parameter and magnetic measurements. The XANES spectra at Fe L- and Fe K-edges indicate partial reduction of Fe3+ ions into Fe2+ upon Zn doping in the Fe2O3 lattice. However, divalent state is favourable for Zn (i.e. Zn2+) within the doping range reported in this study.
URI
http://pubs.kist.re.kr/handle/201004/70156
ISSN
0304-8853
Appears in Collections:
KIST Publication > Article
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