Electronic Structure Studies of Nanoferrite CuxCo1-xFe2O4 by X-ray Absorption Spectroscopy

Title
Electronic Structure Studies of Nanoferrite CuxCo1-xFe2O4 by X-ray Absorption Spectroscopy
Authors
가우탐S. MuthuraniM. BalajiP. ThakurD. P. Padiyan채근화S. S. KimK. Asokan
Keywords
X-ray Absorption Spectroscopy; Electronic Structure; Nanoferrite; Inverse Spinel; Copper-Cobalt Ferrites; Nanomaterials
Issue Date
2011-01
Publisher
Journal of nanoscience and nanotechnology
Citation
VOL 11, NO 1, 386-390
Abstract
Pure and mixed cobalt copper ferrites are of great interest due to their widespread application in electronics and medicine. We report on the electronic structure of a nanoferrite CuxCo1−xFe2O4 (0.0 ≤ x ≤ 1.0) system studied by X-ray absorption spectroscopy. These magnetic nanoferrites (average crystallite size ~31–43 nm) were synthesized by an auto combustion method and are characterized by high resolution X-ray diffraction and near edge X-ray absorption fine structure measurements at the O K and Co, Cu, and Fe L-edges. The O K-edge spectra suggest that there is a strong hybridization between O 2p and 3d electrons of Co, Cu and Fe cations and Fe L3,2-edge spectra indicate that Fe ions coexist in mixed valence states (Fe3+ and Fe2+) at tetrahedral and octahedral sites of the spinel structure. Copper and cobalt ions are distributed in the divalent state in octahedral sites of the spinel structure. The origin of high saturation magnetization and coercivity in cobalt–copper ferrites are explained in light of these results.
URI
http://pubs.kist.re.kr/handle/201004/40730
ISSN
1533-4880
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE