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IJPAP Vol.44(03) [March 2006] >


Title: Mössbauer, X-ray and magnetization studies of ZnAlxFe2-xO4 system
Authors: Sharma, Suman
Sharma, N D
Keywords: Mössbauer studies
Magnetization
Normal spinel structure
Issue Date: Mar-2006
Publisher: CSIR
IPC CodeG01J 3/28
Abstract: The structural and magnetic properties of the mixed spinel system ZnAlxFe2-xO4 (x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) have been investigated by X-ray diffraction, SEM, EDAX, magnetization and Mössbauer measurements. The Mössbauer parameters, lattice parameters and crystalline size of the products formed with variation in the composition of Fe and Al ratio are studied. The studies confirm the formation of nano-size ferrite particles. It is observed that the lattice parameters and crystalline size decrease with increasing aluminium concentration. All the samples show super paramagnetic relaxation, except the samples (x=0.8, 1.0) which show super paramagnetic behaviour differentiated on the basis of magnetization. The decrease in area ratio with increase in Al concentration has been explained on the basis of ionic radius. The cationic distribution is calculated on the basis of Mössbauer and magnetization. These observations indicate the existence of a non-collinear structure in a nanoparticles ferrite system. The non-collinear structure in this system is also verified by Neel’s two sublattice model.
Page(s): 220-226
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.44(03) [March 2006]

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