Enhanced magnetic properties of doped cobalt ferrite nanoparticles by virtue of cation distribution

[Display omitted] •Narrow dispersed nanocrystalline cobalt ferrites prepared by a facile chemical route.•Doped samples suggest strengthening of A–B and A–A and weakening of B–B interaction.•Anisotropy constant delineates an increasing tendency for doped samples.•Enhanced magnetic properties have bee...

Full description

Saved in:
Bibliographic Details
Published in:Journal of alloys and compounds 2015-03, Vol.625, p.216-223
Main Authors: Chakrabarty, S., Dutta, A., Pal, M.
Format: Article
Language:English
Subjects:
Alloys
Anisotropy
Cations
Cobalt ferrites
Coercive force
Constants
Crystal structure and microstructure
Devices
Magnetic measurements
Magnetic properties
Nanoparticles
Nanostructured materials
Precipitation
TEM
X-ray diffraction
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:[Display omitted] •Narrow dispersed nanocrystalline cobalt ferrites prepared by a facile chemical route.•Doped samples suggest strengthening of A–B and A–A and weakening of B–B interaction.•Anisotropy constant delineates an increasing tendency for doped samples.•Enhanced magnetic properties have been analyzed with cation distribution model. Enhancement of magnetic moment as well as magnetocrystalline anisotropy constants is very much required for the device application of cobalt ferrites. We are able to achieve enhanced magnetic properties of nanocrystalline cobalt ferrite by virtue of suitable doping. Pure, Mn and Ni doped cobalt ferrite nanoparticles have been synthesized using facile soft chemical route. XRD analysis using Rietveld refinement technique confirms the growth of pure, single phase cobalt ferrite nanoparticles, which corroborates with TEM study. The observed increase in saturation magnetization for the doped samples can be attributed to the migration of Co2+ ions from B site to A site and hence Fe3+ ions from A site to B site. Detailed magnetic analysis using Law of Approach, shows an increase of different magnetic properties like anisotropy constant, anisotropy field, coercivity for the doped samples, could be due to the increase in magnetic interaction between two sites due to different cation distribution. A structure property correlation has been established by proposing a cation distribution which enables us to explain the enhancement of magnetic properties.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2014.10.179