Room temperature ferromagnetism in Th1-xFexO2-δ (x=0.0, 0.05, 0.10, 0.15, 0.20 and 0.25) nanoparticles

Nanocrystalline (Th1-xFex)O2-delta particles with different Fe concentrations (x = 0.,0.0,0.1,0.1,0.20 and 0.25) have been prepared by a gel combustion method. Rietveld refinement analyses of X-ray diffraction data revealed the formation of an impurity free cubic type Th1-xFexO2-delta structure up t...

Full description

Saved in:
Bibliographic Details
Published in:Journal of alloys and compounds 2008-08, Vol.461 (1-2), p.608-611
Main Authors: JAYAKUMAR, O. D, GOPALAKRISHNAN, I. K, VINU, A, ASTHANA, A, TYAGI, A. K
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Magnetic properties and materials
Magnetic properties of nanostructures
Materials science
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Physics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Nanocrystalline (Th1-xFex)O2-delta particles with different Fe concentrations (x = 0.,0.0,0.1,0.1,0.20 and 0.25) have been prepared by a gel combustion method. Rietveld refinement analyses of X-ray diffraction data revealed the formation of an impurity free cubic type Th1-xFexO2-delta structure up to x = 0.20. This observation is further confirmed from the detailed studies conducted on 10 at.% Fe doped ThO2 using high-resolution transmission electron microscopy (HRTEM) imaging and indexing of the selected-area electron diffraction (SAED) patterns. DC magnetization studies as a function field indicate that they are ferromagnetic with Curie temperature (Tc) well above room temperature.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2007.07.081