Journal of Sol-Gel Science and Technology (2018) 86:731–742
https://doi.org/10.1007/s10971-018-4665-3
ORIGINAL PAPER: SOL-GEL AND HYBRID MATERIALS FOR DIELECTRIC,
ELECTRONIC, MAGNETIC AND FERROELECTRIC APPLICATIONS
Ni
2+
-substituted Mg–Cu–Zn ferrites: a colloidal approach of tuning
structural and electromagnetic properties
L. M. Thorat
1
●
J. Y. Patil
2
●
D. Y. Nadargi
3
●
U. R. Ghodake
3
●
R. C. Kambale
4
●
S. S. Suryavanshi
2
Received: 8 December 2017 / Accepted: 16 April 2018 / Published online: 11 May 2018
© Springer Science+Business Media, LLC, part of Springer Nature 2018
Abstract
A robust synthesis approach to Ni
2+
-substituted Mg
0.25-x
Ni
x
Cu
0.25
Zn
0.5
Fe
2
O
4
(0 ≤ x ≤ 0.25 mol.) ferrimagnetic oxides using
citrate assisted sol–gel process is reported. The route utilizes simple metal nitrate precursors in aqueous solution, thus
eliminating the need for organometallic precursors. Citric acid acts as a fuel for the combustion reaction and forms stable
complexes with metal ions preventing the precipitation of hydroxilated compounds to yield the composite ferrite structure by
auto-combustion process. The XRD signatures, especially (3 1 1) plane, confirmed the formation of spinel structure. The
linear growth of lattice constant from 8.385 to 8.409 Å was observed by Ni
2+
substitution from 0 to 0.25. The dense
microstructure is observed with the average grain size of 0.42–2.18 µm. The transport properties revealed the
semiconducting behavior of as-prepared ferrite material, with an increase in the DC-electrical resistivity by the
incorporation of nickel. The magnetic properties viz. initial permeability (µ
i
) and magnetic moment (n
B
) are explained, based
on the deviation in saturation magnetization (M
s
), anisotropy constant (K
1
)
,
density values, and exchange interactions.
Furthermore, the effect of adding Ni
2+
on the Curie temperature, frequency-dependent dielectric properties of the ferrite
material are also discussed.
* S. S. Suryavanshi
sssuryavanshi@rediffmail.com
1
Department of Electronics, S. M. Dnyandeo Mohekar
Mahavidyalaya, Kalamb 413507, Maharashtra, India
2
School of Physical Sciences, Solapur University, Kegaon,
Solapur 413255, Maharashtra, India
3
Department of Electronics, Shri Shivaji Mahavidyalaya, Barshi,
Solapur 413401, Maharashtra, India
4
Department of Physics, Savitribai Phule Pune University,
Pune 411007, Maharashtra, India
Electronic supplementary material The online version of this article
(https://doi.org/10.1007/s10971-018-4665-3) contains supplementary
material, which is available to authorized users.
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