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A Comparative study on structural and magnetic properties of La, Cr and Al doped M-type Calcium hexagonal nano ferrites prepared by Sol gel auto-combustion method

Publication Date : 24/08/2015



Author(s) :

B.S.Satone , K.G.Rewatkar.


Volume/Issue :
Volume 2
,
Issue 8
(08 - 2015)



Abstract :

Nano particles  of Calcium substituted ferrites namely CaLa1Fe11O19, CaCr1Fe11O19 and CaAl1Fe11O19 have been chosen for their comparative studies on structural and magnetic properties. Above ferrite samples were successfully synthesized  by sol gel auto combustion method. X-ray  diffraction  studies  revealed  the  formation  of  mono  phase  M  type hexagonal ferrite with mono phase space group P63/mmc (no194). The SEM and TEM  were studied,   which confirmed that  the sample exhibit relatively well defined hexagonal like grains with average particle size in the range 52 nm to 38nm. The values of the lattice parameters supports this conformation.           The magnetic measurements were carried by using Vibration Sample Magnetometer (VSM) shown that, as compared to La and Cr, the  Al doped sample leads to a increase in saturation magnetization and to a significant increase in the coercive field. Thus the  magnetic characters of the Al doped samples are superior  than that of La and Cr doped calcium hexaferrites. It is known that the nano-hexaferrites with such special magnetic properties are highly useful in Data storage applications. 


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A Comparative study on structural and magnetic properties of La, Cr and Al doped M-type Calcium hexagonal nano ferrites prepared by Sol gel auto-combustion method

August 21, 2015