TITLE:
Structural, Magnetic and Dielectric Properties of Fe-Co Co-Doped Ba0.9Sr0.1TiO3 Prepared by Sol Gel Technique
AUTHORS:
Inas Kamal Batttisha, Ibrahim Sayed Ahmed Farag, Mostafa Kamal, Mohamed Ali Ahmed, Emad Girgis, Hesham Azmi El Meleegi, Fawzi Gooda El Desouky
KEYWORDS:
Sol Gel, Nano-Structure, Magnetic Hysteresis Loop, Dielectric Permittivity, Nano-Composite BaSrTiO3 (BST), TEM, XRD, SEM
JOURNAL NAME:
New Journal of Glass and Ceramics,
Vol.4 No.2,
April
25,
2014
ABSTRACT: The structural, dielectric and magnetic properties of pure and Fe-Co
co-doped Ba0.9Sr0.1TiO3, (Ba(1-x)SrxTiO3, where (x = 0.10) and (Ba0.9Sr0.1Ti(1-x-y)FexCoyO3), where (x = 0.1, y = 0) and (x = 0 and y = 0.10) and (x = 0.5, y = 0.5) in
powder form, abbreviated as (BST) and (BST10FO), (BST10CO) and (BST5F5CO),
respectively were prepared by a modified sol gel technique. Crystallization, surface
morphology and electrical behavior of BST are improved by Fe3+ and
Co2+ ions with optimized grain size. Phase identification by using
X-ray diffraction and surface morphology will be studied by using transmission electron microscope (TEM) and
scanning electron microscope imaging (SEM). Phase identification by
using X-ray diffraction and surface morphology evaluation by using transmission
electron microscope (TEM) and scanning electron microscope imaging (SEM) will
be studied. The nano-scale presence and the formation of the tetragonal
perovskite phase as well as the crystallinity were detected using the mentioned techniques. The
dielectric properties of the prepared samples have been investigated as a
function of temperature and frequency. The dielectric measurements are carried
out in the frequency range of 42 Hz - 1 MHz, at temperature ranging between
25°C and 250°C. The results showed an abrupt decrease in the dielectric
permittivity by increasing the frequency range. The magnetic hysteresis loop
confirmed enhancement in the magnetization properties by co-doping with Fe3+-Co2+ ions. An increase in the saturation of the magnetization at room temperature
was detected by decreasing the crystallite sizes of the prepared samples.