Journal of Materials Science and Engineering with Advanced TechnologyAuthor's: Kh. Roumaih and M. Kaiser
Pages: [159] - [171]
Received Date: November 16, 2009
Submitted by: Kin Ho Lo
The effect of gallium substitution on conduction mechanism and the
magnetic properties of 
ferrites have been studied. It was found that
the value of the DC electrical conductivity decreased with the
increasing of 
concentration. The thermoelectric power
is negative, which indicates n-type
semiconductor behavior for all samples. The hysteresis curve recorded
at room temperature shows that the samples are ferrimagnetic at room
temperature. The coercive field 
decreases with increasing content in the samples, indicating that the
loss of magneto crystalline anisotropy. The initial permeability
is steadily decreased with the increasing
temperature and becomes constant at a very small value of 
The Curie temperature decreases with
increasing concentration.
conduction mechanism, magnetic properties, thermoelectric power, ferrimagnetic ferrites.
