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Persistent URL
http://purl.org/net/epubs/work/54079790
Record Status
Checked
Record Id
54079790
Title
Nanoscale Clustering and Magnetic Properties of Mn x Fe3−x O4 Particles Prepared from Natural Magnetite
Contributors
A Taufiq
,
S Sunaryono
,
EGR Putra
,
A Okazawa
,
I Watanabe
,
N Kojima
,
S Pratapa
,
D Darminto
Abstract
A series of Mn x Fe3−x O4 (0 ≤ x ≤ 1) nanoparticles was successfully synthesized via a simple coprecipitation method. The starting material was a natural magnetite purified from local iron sand. Crystallite nanoparticles were produced by drying without using a high calcination temperature. Rietveld analysis of the X-ray diffractometry (XRD) data for all samples demonstrated that the Mn ions partially substituted the Fe ions in the spinel cubic structure of the Fe3O4 to form Mn x Fe3−x O4 phases. We applied two lognormal spherical and single mass fractal models to the analysis of the small-angle neutron scattering (SANS) data and revealed that the primary Mn x Fe3−x O4 particles ranged in size from 1.5 to 3.8 nm and formed three-dimensional clusters as secondary structures. The samples displayed superparamagnetic behavior, having the saturation magnetization which was most likely influenced by the competing contribution from Mn, the sizes of the primary particles, and their clusters. Further analysis revealed that the zero-field-cooled and field-cooled curves of the Mn x Fe3−x O4 nanoclusters exhibited a superparamagnetic phenomenon with the lowest magnetic blocking temperature approximately 145 K.
Organisation
ISIS
,
ISIS-RIKEN
,
ISIS-MUONS
,
STFC
Keywords
Funding Information
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Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
J Supercond Nov Magn
28, no. 9 (2015): 2855 -2863.
https://doi.org/1…07/s10948-015-3111-9
2015
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