Effect of Mg substitution on Structural, Infrared and
Dielectric properties of NiCuZn Ferrites
S.M. Kabbura,*, U.R.Ghodakeb, S.S.Suryavanshic,
a
Department of Physics, Shri Shivaji Mahavidyalaya, Barshi-413411,Dist-Solapur,Maharashtra,India
b
Department of Electronics,Shri Shivaji Mahavidyalaya, Barshi-413411,Dist-Solapur,Maharashtra,India
c
School of Physical Sciences,Solapur University,Kegaon,Solapur-413255,India
*Corresponding author. Tel.: 91-02184-226190: Mobile:+91 9421025178
E-mail address: sadhanakabbur@yahoo.in(S.M.Kabbur)
Abstract
Magnetic nanoparticles of mixed spinel ferrites
1.19
Refractive Index ()
2.60
Keywords: Auto combustion method; cation
distribution; refractive index; Velocity of IR waves,
dielectric constants
B
C
2.58
1.18
1.17
2.56
1.16
1.15
10
2.54
1.14
2.52
0.00
0.05
0.10
0.15
0.20
0.25
Composition (x)
1.Introduction
Nanocrystalline spinel ferrites have gained
importance because of their unique magnetic
properties. NiCuZn ferrites are well established soft
magnetic materials for Multi Layer Chip Inductor
(MLCI) applications because of their relatively low
sintering temperature, high permeability in the
radiofrequency (RF) region, high electrical resistivity,
environmental stability, good catalytic activity,
resistance to corrosion and high thermodynamic
stability. Recently there is a growing interest of Mg
based ferrites which are used in microwave devices
because of their high electrical resistivity and low
dielectric losses and cost. Moreover MgO is a very
stable oxide and avoids the formation of divalent iron
and thereby increasing its resistivity
2. Results and Discussion
Fig.1. Compositional variation of refractive index(ƞ)
and velocity of IR Waves(v)
2.1 Optical Parameters
When
materials
are
exposed
to
electromagnetic radiation, it is sometimes important
to predict and alter their responses. This is possible
when we are familiar with their optical properties and
understand the mechanism responsible for their
behavior. The index of refraction(ƞ), and the velocity
of IR radiation(v) in the present ferrite material can
be estimated using the relation:
𝐸𝑡𝑟𝑎𝑛𝑠
𝐸𝑎𝑏
𝑐
= = ƞ, where Etrans is transmitted energy, Eab
𝑣
is the absorbed energy and c is the velocity of light.
From XRD spectra, cation distributon, site
radii(rA & rB),crystallite size (D) are determined and
from FTIR spectra, ϑ1 and ϑ2 bands, optical
parameters like refractive index (ƞ), velocity of IR
waves (v), jump rate(J) are determined.
Etrans = h c ϑth and Eab = h c ϑ1, where ϑth is threshold
frequency in cm-1 and ϑ1 is frequency of tetrahedral
site.The magnitude of ƞ or the degree of bending
depends on the wavelength of the incident radiation
and decreases with increasing wavelength.Dielectric
parameters exhibit exhibit normal ferrimagnetism.
Table: Compositional data on ƞ and v
References
Composition Refractive Index
Velocity of IR Waves (v)
(x)
(ƞ)
0.00
2.531
1.200
0.05
2.549
1.177
0.10
2.560
1.172
0.15
2.592
1.157
0.20
2.622
1.144
0.25
2.621
1.144
1010 cm/sec.
Velocity of IR Waves (v)x10
Ni0.25-xMgxCu0.30Zn0.45Fe2O4 where x=0.00,0.05, 0.10,
0.15,0.20 and 0.25 were prepared by sol-gel method and
glycine as the chelating agent. FTIR spectra and
impedance analyser respectively.Cation distribution,optical
parameters like refractive index , velocity of IR waves,jump
rates, DC and AC resistivities, dielectric parameters are
reported.
1.20
2.62
1. Ch.Sujatha, K.Venugopal ReddY,K.Sowri
Babu,A.Ramachandra
Reddy,K.H.Rao,″Structural
and magnetic properties of Mg substituted NiCuZn
Nano ferrites″,Physica B 407(2012)1232-1237.
2. O.M.Hemeda,″IR spectral studies of Co0.6Zn0.4Mnx
Fe2-xO4ferrites″,J.of Magn. and Magn, Materials
281(2004)36-41.