14 / 23
Page 86
conferenceseries
.com
Volume 6
Research & Reviews: Journal of Material Sciences
ISSN: 2321-6212
Magnetic Materials 2018
October 22-23, 2018
October 22-23, 2018 | Rome, Italy
3
rd
International Conference on
Magnetism and Magnetic Materials
Structural and magnetic properties of TbNi-substituted calcium strontium M-type nano-structured
hexaferrites
Hasan M Khan, M U Islam, Imran Sadiq, Muhammad Azhar Khan, Khurrum Bajwa
and
Muhammad Aziz
The Islamia University of Bahawalpur, Pakistan
T
he effect of TbNi substitution on the structural and magnetic properties of Sr
0.5
Ba
0.5-x
Tb
x
Ni
y
Fe
12-y
O
19
, (x = 0.00–0.10; y
= 0.00–1.00) hexaferrites that are synthesized by sol-gel auto combustion method is investigated. After synthesis of the
samples by the sol-gel method they were characterized by (FTIR) Fourier transform infrared spectroscopy, (XRD) x-ray
diffraction, (SEM) scanning electron microscopy, (TEM) transmission electron microscopy and (VSM) vibrating sample
magnetometry. The single phase of an M-type hexaferrite structure has been confirmed by X-ray diffraction analysis. The
lattice parameters were found to increase by increasing TbNi contents, and are thought of due to ionic sizes of the cations
implicated. The TbNi has been completely soluble in the lattice. The scanning electron microscopy and transmission electron
microscopy results clearly indicate that the grain size decreases with an increase of TbNi substitution. The coercivity values
(1640–2170Oe) of all samples exhibit in the M-type hexaferrite range and shows increased anisotropy by the substitution of
TbNi, while the size of nanoparticles was drastically reduced between 20 and 30 nm. The fine nanoparticles with increased
anisotropy are very attractive in a lot of applications, such as perpendicular recording media, high-frequency applications and
for improving the signal to noise ratio.
hmkhan@iub.edu.pkRes. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C6-030